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feat: release Colour Tools 0.1.0

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public/CHANGELOG.md
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# Changelog
All notable changes are documented here.
## Unreleased
## 0.1.0 - 2026-08-31
- Added a local CSS colour parser and converters for web, perceptual,
wide-gamut and developer colour formats, including bounded batch conversion.
- Added arbitrary RGBA layer compositing with Porter–Duff source-over,
per-layer opacity, standard blend modes, reordering, encoded-sRGB and
linear-light processing, and optional matte flattening.
- Added multi-stop colour ramps with positioned stops, nine interpolation
spaces, selectable hue routes, easing, premultiplied/straight alpha control
and CSS/JSON export.
- Added a large pointer and keyboard picker with alpha, exact CSS input,
browser-native colour input, local history and optional system EyeDropper.
- Added bounded local image decoding, coordinate and neighbourhood sampling,
deterministic perceptual palette extraction and Web Worker fallback.
- Added transparency-aware WCAG 2 contrast reporting and nearby passing colour
suggestions, Delta E comparison, gamut inspection/mapping and clearly
labelled colour-vision simulations.
- Added harmony, tint, shade and tone generation with local named palettes,
palette import and six design-token export formats.
- Added the shared Toolbox shell, system/light/dark themes, responsive layouts,
accessible navigation, nested-path deployment, offline application shell and
deterministic static release packaging.
- Added a GPL-3.0-or-later project licence and exact runtime dependency notices,
including Color.js 0.7.1 under MIT.
public/CONTRIBUTING.md
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# Contributing
Thank you for improving Colour Tools. Contributions should preserve its three
core properties: local-first processing, explicit colour semantics and a
relocatable static build.
## Set up
Use Node.js 22 or newer and npm 11 or newer.
```sh
npm ci
npm run check
npm run test:browser
```
Run `npm run dev` for the development server. Do not commit `dist/`, `release/`,
local images, browser traces or editor secrets.
## Expectations
- Keep calculations pure and serialisable where practical. Add unit tests for
numeric boundaries, invalid input, alpha and out-of-gamut behaviour.
- Never add telemetry, remote image processing, remote fonts or implicit
network lookups. A feature that needs network access requires prior design
discussion and a plainly visible, opt-in boundary.
- Preserve values outside a target gamut until mapping is explicitly requested.
Name the transfer curve or working light for operations where it changes the
result.
- Bound file bytes, decoded dimensions, worker jobs, list sizes and generated
output. Release object URLs, workers and large buffers after use.
- Keep all application URLs relative. Test from the nested path used by the
Playwright server, not only `/`.
- Ensure every pointer interaction has a keyboard route and every colour-only
signal has a textual or structural equivalent. Use semantic controls before
custom roles.
- Document third-party runtime code in `THIRD_PARTY_NOTICES.md`, retain its
exact licence in `LICENSES/`, and confirm compatibility with GPLv3 or later.
## Changes and review
Keep a change focused and update `CHANGELOG.md` for user-visible behaviour.
Include the reasoning behind colour-math choices and cite a primary standard
where the choice is normative. Screenshots can help explain UI changes but do
not replace browser tests.
Before proposing a change, run `npm run check` and `npm run test:browser`.
Tests must not contact external hosts. Security-sensitive reports should follow
[SECURITY.md](SECURITY.md) instead of a public issue.
Contributions are accepted under the repository's
`GPL-3.0-or-later` licence.
public/LICENSE
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16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
public/LICENSES/README.md
+10
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# Licence inventory
Colour Tools is `GPL-3.0-or-later`; the full project licence is at `../LICENSE`.
`THIRD_PARTY_NOTICES.md` identifies shipped runtime packages. Release
preparation collates the exact installed licence files for every locked runtime
package into `npm-runtime-licenses.txt`.
`colorjs.io-MIT.txt` is retained separately because Color.js supplies the core
standards-aligned colour conversion primitives used by the application.
public/LICENSES/colorjs.io-MIT.txt
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MIT License
Copyright (c) 2021 Lea Verou, Chris Lilley
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
public/LICENSES/npm-runtime-licenses.txt
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==============================================================================
@add-ideas/toolbox-contract@0.2.3
Declared licence: Apache-2.0
Installed from: node_modules/@add-ideas/toolbox-contract
==============================================================================
--- LICENSE ---
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
Copyright 2026 ADD Ideas
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================
@add-ideas/toolbox-shell-react@0.2.3
Declared licence: Apache-2.0
Installed from: node_modules/@add-ideas/toolbox-shell-react
==============================================================================
--- LICENSE ---
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
Copyright 2026 ADD Ideas
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================
colorjs.io@0.7.1
Declared licence: MIT
Installed from: node_modules/colorjs.io
==============================================================================
--- LICENSE ---
MIT License
Copyright (c) 2021 Lea Verou, Chris Lilley
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
==============================================================================
react@19.2.8
Declared licence: MIT
Installed from: node_modules/react
==============================================================================
--- LICENSE ---
MIT License
Copyright (c) Meta Platforms, Inc. and affiliates.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
==============================================================================
react-dom@19.2.8
Declared licence: MIT
Installed from: node_modules/react-dom
==============================================================================
--- LICENSE ---
MIT License
Copyright (c) Meta Platforms, Inc. and affiliates.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
==============================================================================
scheduler@0.27.0
Declared licence: MIT
Installed from: node_modules/scheduler
==============================================================================
--- LICENSE ---
MIT License
Copyright (c) Meta Platforms, Inc. and affiliates.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
public/README.md
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# Colour Tools
Colour Tools is a standalone, local-first browser workbench for converting,
compositing, interpolating, sampling, comparing and organising colours. It is
part of the
[add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal), but every
release also runs independently from a static HTTPS host or local preview.
No colour, image, palette or usage event is sent to a server. Image decoding,
pixel sampling and palette extraction happen in the browser; the application
has no analytics, accounts, advertisements or remote lookup feature.
## Workspaces
- **Convert** parses CSS colours and presents copy-ready hex, RGB, HSL, HSV,
HWB, CMYK, Lab, LCH, OKLab, OKLCH, Display P3, Adobe RGB, ProPhoto RGB,
Rec. 2020 and XYZ representations. Wide-gamut coordinates remain intact
until an explicit display or gamut-mapping step. A batch converter isolates
invalid lines instead of silently dropping them.
- **Composite** calculates Porter–Duff source-over for an arbitrary ordered
stack of translucent colours. Each layer has its own alpha, opacity and
blend mode. The working-light choice makes encoded-sRGB and linear-light
results explicit, and an optional matte produces an opaque RGB result.
- **Steps** builds multi-stop colour ramps in perceptual, RGB or cylindrical
colour spaces. It supports positioned stops, five hue routes, easing,
premultiplied-alpha interpolation by default with a straight-alpha option,
and copy-ready CSS and JSON output.
- **Pick** provides a large keyboard- and pointer-operable HSV picker, alpha
control, exact CSS entry, browser-native colour input, recent picks and the
system EyeDropper API where the browser exposes it.
- **Image** accepts one bounded local PNG, JPEG, WebP, GIF or AVIF. It samples
an exact coordinate or a configurable average/median neighbourhood and
extracts two to twelve perceptual palette colours in a worker when
available.
- **Contrast** flattens transparency against a stated canvas, reports WCAG 2
contrast thresholds, finds a nearby passing foreground, compares colours by
six Delta E methods, checks colour gamuts and previews four approximate
colour-vision deficiencies.
- **Palette** creates OKLCH harmonies, tints, shades and tones; keeps a named
palette in local browser storage; imports common text/JSON token forms; and
exports CSS, SCSS, JSON, Design Tokens JSON, JavaScript or CSV.
Adding a generated or sampled colour to the palette is always explicit. The
saved palette is device-local and can be cleared from the Palette workspace or
by clearing site storage.
## Colour behaviour
Colour Tools keeps source coordinates outside display gamuts so conversions do
not destructively clip them. Browser previews and hex exports are mapped to
sRGB with an explicit indicator when mapping was needed. Compositing is carried
out in the selected sRGB working light, while interpolation defaults to OKLCH
for perceptual spacing. See [docs/COLOUR-MATH.md](docs/COLOUR-MATH.md) for the
formulas, bounds and terminology.
Contrast pass/fail indicators follow WCAG 2 ratios: 3:1 for non-text UI and
large text, 4.5:1 for normal AA text and 7:1 for normal AAA text. They are an
engineering aid, not a complete accessibility audit; typography, state,
context and non-colour cues still need human review.
## Local image handling
Selecting an image decodes a bounded raster locally with `createImageBitmap`
where available. The image-element fallback uses a temporary in-memory object
URL. Decoded resources and any fallback URL are released when the image is
replaced, removed or the workspace is closed. Palette extraction uses a
deterministic OKLab clustering implementation and bounded sampling rather than
uploading the image or retaining a copy. Metadata outside the decoded raster
is not exposed or stored by the application.
## Browser support
Current evergreen Firefox, Chromium and Safari are the deployment target.
JavaScript modules, CSS custom properties, Canvas 2D and Web Workers are used.
The EyeDropper API is progressive enhancement and only appears where a browser
supports it. Clipboard writes, service workers and EyeDropper access may
require HTTPS and browser permission; all core calculations work without them.
The UI supports system, light and dark themes through the shared Toolbox shell.
Tabs, picker controls and image sampling are keyboard operable, status changes
use live regions, and swatches are accompanied by machine-readable colour
values rather than relying on colour alone.
## Offline application shell
Production builds include a relative-scope web app manifest and a
subpath-aware service worker. After one successful load, the worker caches the
application shell and same-origin built assets, uses network-first navigation
with a cached fallback, serves cached static resources where possible and
removes obsolete cache versions. Service-worker support is optional; colour
operations never depend on a network connection.
## Development
Requirements: Node.js 22 or newer and npm 11 or newer.
```sh
npm ci
npm run check
npm run test:browser
npm run dev
```
Vite uses `base: './'`, so `dist/` is relocatable to `/` or a nested Toolbox
path. `toolbox-check` validates standalone and contextual operation.
The main implementation layers are described in
[docs/ARCHITECTURE.md](docs/ARCHITECTURE.md). Contributions should follow
[CONTRIBUTING.md](CONTRIBUTING.md); please report security concerns according
to [SECURITY.md](SECURITY.md).
## Release
```sh
npm run release:artifact
```
This command checks the manifest, types, lint, formatting, unit tests,
production build, Toolbox contract and browser workflows, then creates a
deterministic `release/colour-tools-0.1.0.zip` and matching SHA-256 sidecar.
The archive is a ready-to-host static application and contains project and
third-party licence notices.
## Licence
Colour Tools is free software under `GPL-3.0-or-later`. See
[LICENSE](LICENSE). Runtime dependencies retain their respective licences; see
[THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).
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# Security policy
## Supported versions
Security fixes are made on the current release line. Users should update to the
latest published tag and verify the release ZIP against its `.sha256` sidecar.
## Reporting a vulnerability
Please report a suspected vulnerability privately to the repository owner via
the contact channel shown on the
[Gitea profile](https://git.add-ideas.de/lotobo) or a private Gitea message. Do
not include private images, access tokens, unpublished exploit details or other
sensitive material in a public issue.
Include the affected version, browser and operating system; a minimal local
reproduction; the expected impact; and whether the issue requires a crafted
image, palette or colour string. You should receive acknowledgement within
seven days. Coordinated disclosure is appreciated while a fix and release are
prepared.
## Security model
Colour Tools is a static browser application. It has no application backend,
account system, analytics endpoint or image-upload endpoint. All selected image
bytes are decoded and processed locally. Saved palette entries use browser
storage for the current origin. Clipboard, file picker, download and EyeDropper
actions happen only after a user gesture and remain governed by browser
permissions.
File processing is deliberately bounded by encoded byte size, decoded pixel
count and dimensions. Image palette extraction samples a bounded number of
pixels and can run in a disposable worker. Object URLs and worker jobs are
cancelled or released when replaced. Input is displayed as text or parsed by
typed colour/image APIs; it is not evaluated as script or inserted as trusted
HTML.
Production hosts should serve the headers in
[docs/PRIVACY-SECURITY.md](docs/PRIVACY-SECURITY.md), use HTTPS, keep MIME types
correct, disable content sniffing and avoid injecting third-party scripts. A
host can still observe ordinary HTTP metadata for the initial static-file
request; “local-first” describes application data processing, not anonymity
from the static host.
## Out of scope
Colour rendering differences between conforming browser/OS colour-management
pipelines are not vulnerabilities by themselves. Likewise, an approximate
colour-vision simulation is an educational preview, not a medical diagnosis or
a complete accessibility guarantee.
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# Corresponding source and provenance
The corresponding source for Colour Tools 0.1.0 is:
https://git.add-ideas.de/lotobo/colour-tools/src/tag/v0.1.0
Build that tag with Node.js 22 and the exact dependency graph recorded in
`package-lock.json`:
```sh
npm ci
npm run release:artifact
```
The generated JavaScript and CSS bundles are not the preferred form for
modification. No runtime code is loaded from a CDN. The production ZIP contains
this source pointer, the application licence, the dependency licence inventory,
and the applicable third-party notices.
## Implementation provenance
- The application is original project code and uses the shared Toolbox SDK
packages at version 0.2.3 for its manifest contract, shell, and build checks.
- Colour conversion and adaptation use Color.js 0.7.1. Its MIT licence is
reproduced in `LICENSES/colorjs.io-MIT.txt`.
- The compositing, interpolation, palette, image-sampling, contrast, comparison,
gamut, and colour-vision utilities in `src/colour` and `src/palette` were
implemented for this project.
- CSS Color 4 and WCAG 2.2 were used as public technical specifications. No
source code or branded assets were copied from the example websites that
informed the feature list.
public/THIRD_PARTY_NOTICES.md
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# Third-party notices
Release preparation collates licence files for the exact locked runtime
packages into `LICENSES/npm-runtime-licenses.txt` inside the static artifact.
| Package | Version | Licence | Role | Source |
| -------------------------------- | ------- | ---------- | ------------------------------------ | ------------------------------------------- |
| `@add-ideas/toolbox-contract` | 0.2.3 | Apache-2.0 | manifest and context contract | https://git.add-ideas.de/lotobo/toolbox-sdk |
| `@add-ideas/toolbox-shell-react` | 0.2.3 | Apache-2.0 | shared shell, theme and actions | https://git.add-ideas.de/lotobo/toolbox-sdk |
| `colorjs.io` | 0.7.1 | MIT | parsing, conversion and colour maths | https://github.com/color-js/color.js |
| `react` | 19.2.8 | MIT | application UI | https://github.com/facebook/react |
| `react-dom` | 19.2.8 | MIT | browser rendering | https://github.com/facebook/react |
`scheduler` 0.27.0, distributed by the React project under MIT, is the only
transitive runtime package. Development-only packages build and test the
source but are not shipped as runtime modules.
The exact Color.js notice is retained at
`LICENSES/colorjs.io-MIT.txt`. Apache-2.0 and MIT texts from all installed
runtime packages are reproduced by the deterministic release-preparation step.
CSS Color, CSS Compositing and Blending, WCAG and the linked web utilities that
informed the product requirements are specification or research references
only. Their source code, artwork and documentation wording are not bundled or
copied into Colour Tools.
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# Accessibility notes
Colour Tools treats colour as data as well as appearance. Swatches are paired
with textual values, gamut/contrast status uses text and symbols in addition to
hue, and generated palettes remain usable without visually distinguishing
every swatch.
Workspace navigation uses tabs with selected state and arrow/Home/End keyboard
navigation. Native inputs and labelled controls are preferred. The large picker
supports arrow-key adjustment and announces its saturation and brightness;
image sampling supports numeric coordinates and keyboard movement in addition
to pointer selection. Calculation and file statuses use live regions without
clearing the last valid result while a user is typing.
The shared Toolbox shell provides system, light and dark themes. Focus rings,
touch targets, reflow and text contrast should be checked in all themes and at
400% zoom. A WCAG contrast result is not itself proof that the complete
interface conforms: test keyboard order, names/roles/values, error recovery,
high contrast modes, reduced motion and screen-reader output in context.
public/docs/ARCHITECTURE.md
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# Architecture
Colour Tools is a client-only React application built as relocatable static
files. The UI and calculation engine are intentionally separated so colour
operations can be tested without a browser and UI state can keep showing the
last valid result while an input is incomplete.
## Layers
1. `src/colour/` is the serialisable colour domain. It parses and formats
colours, converts gamuts, composites layers, interpolates stops, evaluates
contrast and Delta E, simulates colour-vision deficiencies, and builds or
exports palettes. Its public API is re-exported from `src/colour/index.ts`.
2. `src/palette/` contains browser-independent raster bounds, sampling and
deterministic OKLab clustering. `src/workers/palette.worker.ts` exposes the
expensive extraction path to a dedicated worker.
3. `src/components/` contains the seven workspaces and shared accessible
controls. Workspace selection is represented by a URL fragment, so a view
can be bookmarked without router or server support.
4. `src/hooks/` owns bounded device-local UI persistence. Image bytes are not
stored there.
5. `src/toolbox/` contains the checked manifest identity. The shared Toolbox
shell supplies navigation, contextual actions and theme behaviour without
changing the standalone application domain.
## Colour values
The engine's `ColourValue` is a plain object: colour-space identifier, three
numeric coordinates and alpha. It deliberately carries coordinates that may
sit outside a display gamut. Color.js 0.7.1 supplies standards-aligned parsing
and conversion primitives; Colour Tools wraps these in typed, bounded domain
operations and stable UI formats.
Browser preview is a separate operation. It maps a value to sRGB and reports
whether mapping occurred. This keeps display limitations from mutating the
source colour used by later conversions or comparisons.
## Raster pipeline
The image picker validates the selected file before decode, rejects excessive
bytes/dimensions/pixels, then draws the decoded image to a same-origin in-memory
Canvas 2D surface. Sampling reads a bounded neighbourhood. Palette extraction
subsamples deterministically, converts points to OKLab and clusters them with a
fixed initialization and iteration bound. The worker client can fall back to
the same pure function when workers are unavailable.
Temporary object URLs are revoked and outstanding extraction is aborted when an
image is replaced or removed. No image or extracted palette is transmitted.
## Build and deployment
Vite builds with a relative base. `scripts/generate-toolbox-manifest.mjs`
checks package, application and Toolbox versions plus immutable source
identity. `scripts/prepare-release-files.mjs` places project documentation and
the exact installed runtime licence inventory beside the executable app.
The service worker is relative-scope and deployment-subpath aware. It is
progressive enhancement: the app remains usable when registration is rejected.
The deterministic packager rejects symbolic links, source maps, secret-like
filenames and root-absolute asset references before creating the release ZIP
and SHA-256 sidecar.
## Testing boundaries
Unit tests cover parsing, numerical operations, invalid inputs, raster bounds,
sampling and palette determinism. Browser smoke tests run the production build
under a restrictive policy at `/deep/nested/colour/`, exercise all major
workspaces and fail on uncaught errors or external network requests. The
Toolbox contract checker validates the static artifact independently.
public/docs/COLOUR-MATH.md
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# Colour mathematics and terminology
This document records the choices that materially change a result. It is not a
replacement for CSS Color, Compositing and Blending, or WCAG.
## Parsing and conversion
The parser accepts CSS colour syntax supported by the installed Color.js
version, including hex and named colours; `rgb()`, `hsl()`, `hwb()`, Lab/LCH
and OKLab/OKLCH functions; and registered `color()` spaces. Conversion keeps
finite coordinates outside a target gamut. Hex and ordinary browser sRGB
previews require mapping; the UI labels when this happened.
The converter exposes device-oriented and mathematical representations, but a
numeric tuple is meaningful only with its named colour space, white point,
transfer curve and alpha convention. CMYK output is a convenient mathematical
conversion, not a printer ICC separation or proof.
## Alpha compositing
For a source colour over a backdrop, with straight alpha `αs` and `αb`, output
alpha is:
```text
αo = αs + αb × (1 − αs)
```
For each premultiplied channel under normal source-over:
```text
Co = Cs × αs + Cb × αb × (1 − αs)
co = Co / αo when αo > 0
```
Layers are accumulated from the bottom upward even though the editor displays
the top layer first. Layer opacity multiplies the colour's own alpha. Blend
modes are applied before source-over using the model in CSS Compositing and
Blending.
“Encoded sRGB” applies the operation directly to sRGB-encoded channel values,
matching many quick web calculators. “Linear-light sRGB” first removes the
sRGB transfer curve and is generally the physically meaningful choice for
mixing emitted light. The two results are expected to differ.
## Interpolation
A ramp samples its first and last stop and distributes missing positions like a
CSS gradient. Each segment is interpolated in the selected space with the
chosen easing. Cylindrical spaces need an explicit hue route: shorter, longer,
increasing, decreasing or raw. The default premultiplies colour components by
alpha before mixing and unpremultiplies afterwards, preventing hidden channels
inside a transparent endpoint from tinting the ramp. A straight-alpha toggle
is available for intentionally reproducing that model. OKLCH is the UI default
because equal numeric progress tends to look more even than encoded RGB; it
does not guarantee that every intermediate colour lies in a display gamut.
## Gamut mapping
An in-gamut check does not modify the colour. Display mapping uses an OKLCH
chroma-reduction method by default; channel clipping is available at the engine
boundary where explicitly selected. The result includes Delta E OK from the
source so callers can quantify the change. A browser preview is always mapped
to sRGB because CSS support and physical displays differ.
## Contrast and transparency
Relative luminance and WCAG 2 contrast are evaluated after translucent
foreground/background colours are composited over the stated canvas (white by
default). The ratio is:
```text
(Llighter + 0.05) / (Ldarker + 0.05)
```
The UI reports 3:1, 4.5:1 and 7:1 thresholds and searches for a nearby lighter
or darker passing foreground. A mathematical pass is only one part of an
accessibility review; font size/weight, focus states, disabled controls,
non-colour cues and actual display conditions remain relevant.
## Perceptual difference and simulations
Delta E 76, CMC, CIEDE2000, Delta E OK, ITP and Jz answer different historical
or application needs; values from different formulas are not interchangeable.
The colour-vision previews apply bounded matrices in linear sRGB and expose a
severity control. They are approximations for interface review, not a model of
every observer and not medical advice.
## Palette extraction
The raster extractor ignores sufficiently transparent pixels, converts bounded
samples to OKLab and clusters them deterministically. Reported coverage is the
share of accepted samples assigned to a cluster, not an exact segmentation of
every source pixel. Small antialiased regions and colour-managed decoding can
therefore influence the result.
public/docs/PRIVACY-SECURITY.md
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# Privacy, security and deployment
## Data flow
Colour input, saved palette entries, selected image bytes, decoded pixels and
generated exports stay in the browser. The application does not issue API
requests, load remote fonts, submit analytics or resolve remote colour
references. A saved palette belongs to the current browser origin and is
stored until the user clears it or browser storage is removed. Images are
in-memory only.
The static host still receives ordinary requests for HTML, JavaScript, CSS,
icons and worker files on initial load and revalidation. Host logs, reverse
proxy logs and browser extension behaviour are outside the application's local
processing boundary.
## Recommended headers
Serve the static artifact over HTTPS and apply a policy equivalent to:
```text
Content-Security-Policy: default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Resource-Policy: same-origin
Permissions-Policy: camera=(), microphone=(), geolocation=(), usb=(), payment=()
Referrer-Policy: no-referrer
X-Content-Type-Options: nosniff
```
The shared Toolbox shell uses inline style properties for colour previews, so
`style-src 'unsafe-inline'` is currently required. Do not add
`script-src 'unsafe-inline'` or third-party script origins. `blob:` is required
for local image object URLs and may be used for a worker fallback.
Serve `.js` as `text/javascript`, `.json` as `application/json`, `.webmanifest`
as `application/manifest+json`, and `.svg` as `image/svg+xml`. Hashed assets may
use a long immutable cache lifetime; keep `index.html`, `sw.js` and
`toolbox-app.json` on revalidation/no-cache so releases update predictably.
## Reverse-proxy example
For an nginx deployment rooted at `/apps/colour/`, use `try_files` only to
resolve actual static files and the directory index; do not rewrite missing
asset paths to HTML. The application itself uses relative paths and needs no
server-side router. Keep the `sw.js` scope at the application directory.
If the app is assembled into toolbox-portal, use the portal's release lock and
assembly process instead of unpacking files into an existing live directory.
Verify the ZIP against its SHA-256 sidecar before assembly.
## File limits and cleanup
The image picker enforces encoded-byte, dimension and decoded-pixel limits
before expensive processing. Sampling radius and palette colour counts are
bounded. Object URLs, decoded buffers and worker requests are released or
cancelled when replaced. Browsers and image decoders remain security-sensitive
dependencies, so deploy current supported browser versions and publish patched
application releases promptly.
See [SECURITY.md](../SECURITY.md) for private reporting instructions.
public/favicon.svg
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
<defs>
<linearGradient id="paper" x1="8" y1="6" x2="55" y2="61" gradientUnits="userSpaceOnUse">
<stop stop-color="#fff"/>
<stop offset="1" stop-color="#ececf4"/>
</linearGradient>
<linearGradient id="spectrum" x1="15" y1="44" x2="49" y2="21" gradientUnits="userSpaceOnUse">
<stop stop-color="#f45274"/>
<stop offset=".28" stop-color="#f3b93f"/>
<stop offset=".52" stop-color="#43b978"/>
<stop offset=".76" stop-color="#3f8ee8"/>
<stop offset="1" stop-color="#8659d7"/>
</linearGradient>
</defs>
<path d="M12 5h27l13 13v39a3 3 0 0 1-3 3H12a3 3 0 0 1-3-3V8a3 3 0 0 1 3-3Z" fill="url(#paper)" stroke="#403b68" stroke-width="3"/>
<path d="M39 5v13h13" fill="#deddeb" stroke="#403b68" stroke-width="3" stroke-linejoin="round"/>
<circle cx="30" cy="37" r="14" fill="url(#spectrum)"/>
<circle cx="30" cy="37" r="5" fill="#fff" fill-opacity=".92"/>
</svg>
Side by Side

After

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public/manifest.webmanifest
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{
"name": "Colour Tools",
"short_name": "Colour",
"description": "Convert, composite, compare and build colours locally.",
"start_url": "./",
"scope": "./",
"display": "standalone",
"background_color": "#f7f7fb",
"theme_color": "#2d2859",
"icons": [
{
"src": "./favicon.svg",
"sizes": "any",
"type": "image/svg+xml",
"purpose": "any maskable"
}
]
}
public/sw.js
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const CACHE_PREFIX = "colour-tools-shell-";
const CACHE_NAME = `${CACHE_PREFIX}0.1.0`;
const CORE = ["./", "./manifest.webmanifest", "./favicon.svg"];
self.addEventListener("install", (event) => {
event.waitUntil(
caches.open(CACHE_NAME).then(async (cache) => {
await cache.addAll(CORE);
const response = await fetch("./");
const html = await response.text();
const assets = [...html.matchAll(/(?:src|href)="(\.\/assets\/[^"]+)"/g)]
.map((match) => match[1])
.filter(Boolean);
await cache.addAll(assets);
}),
);
self.skipWaiting();
});
self.addEventListener("activate", (event) => {
event.waitUntil(
caches
.keys()
.then((keys) =>
Promise.all(
keys
.filter((key) => key.startsWith(CACHE_PREFIX) && key !== CACHE_NAME)
.map((key) => caches.delete(key)),
),
)
.then(() => self.clients.claim()),
);
});
self.addEventListener("fetch", (event) => {
if (event.request.method !== "GET") return;
const url = new URL(event.request.url);
if (url.origin !== self.location.origin) return;
const scope = new URL(self.registration.scope);
if (!url.pathname.startsWith(scope.pathname)) return;
if (event.request.mode === "navigate") {
event.respondWith(
fetch(event.request)
.then((response) => {
if (response.ok) {
const copy = response.clone();
void caches
.open(CACHE_NAME)
.then((cache) => cache.put(event.request, copy));
}
return response;
})
.catch(async () => {
const cached = await caches.match(event.request);
if (cached) return cached;
const shellUrl = new URL("./", self.registration.scope).href;
return (await caches.match(shellUrl)) ?? Response.error();
}),
);
return;
}
event.respondWith(
caches.match(event.request).then(
(cached) =>
cached ??
fetch(event.request).then((response) => {
if (response.ok) {
const copy = response.clone();
void caches
.open(CACHE_NAME)
.then((cache) => cache.put(event.request, copy));
}
return response;
}),
),
);
});
public/toolbox-app.json
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{
"$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json",
"schemaVersion": 1,
"id": "de.add-ideas.colour-tools",
"name": "Colour Tools",
"version": "0.1.0",
"description": "Convert, composite, compare and build colours locally in the browser.",
"entry": "./",
"icon": "./favicon.svg",
"categories": ["graphics", "design", "developer"],
"tags": [
"colour",
"color",
"rgb",
"rgba",
"oklch",
"palette",
"gradient",
"contrast",
"image"
],
"integration": {
"contextVersion": 1,
"launchModes": ["navigate", "new-tab"],
"embedding": "unsupported"
},
"requirements": {
"secureContext": false,
"workers": true,
"indexedDb": false,
"crossOriginIsolated": false,
"topLevelContext": false
},
"privacy": {
"processing": "local",
"fileUploads": false,
"telemetry": false,
"label": "Colours and images stay in this browser; nothing is uploaded."
},
"source": {
"repository": "https://git.add-ideas.de/lotobo/colour-tools",
"license": "GPL-3.0-or-later"
},
"actions": [
{
"id": "source",
"label": "Source",
"url": "https://git.add-ideas.de/lotobo/colour-tools"
}
]
}