Credits

With thanks to the authors whose work this site builds upon.

This site is built almost entirely from code written in-house, and it loads no resources from third-party servers — every file your browser requests is served by us. A small number of third-party works are nonetheless included, and this page lists all of them: 1 software library, 5 colour name sets and 2 icon sets. Each entry records its author, version and licence, links to the original project, and reproduces the full text of its licence.

qrcode-generator

2.0.4 MIT

by Kazuhiko Arase

Encodes a string into the module matrix from which the QR Code Generator draws each code.

Included without modification and served only from this domain. The browser does not request it from any other source.

Full MIT licence text

MIT License

Copyright (c) 2011 Kazuhiko Arase

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.

Project home Used in QR Code Generator

xkcd colour survey

949 names CC0 1.0

by Randall Munroe and the participants of the xkcd colour survey

Provides colour names for the nearest-name matching in Color Tools.

A CC0 dedication carries no attribution requirement. This credit is included in recognition of the many people who contributed their time to the survey.

Dedicated to the public domain by its author

Full CC0 1.0 licence text

CC0 1.0 Universal — Public Domain Dedication

The person who associated a work with this deed has dedicated the work to the
public domain by waiving all of his or her rights to the work worldwide under
copyright law, including all related and neighbouring rights, to the extent
allowed by law.

You can copy, modify, distribute and perform the work, even for commercial
purposes, all without asking permission.

The full legal code is published at:
https://creativecommons.org/publicdomain/zero/1.0/legalcode

Project home Used in Color Tools

Tailwind CSS

4.3.3 MIT

by Tailwind Labs, Inc.

Supplies 288 palette values, used to match a selected colour to the nearest Tailwind shade.

The palette values only; none of the Tailwind CSS source code is included. Tailwind version 4 defines these values in OKLCH, and a number of them fall outside the sRGB colour space. Those are mapped into sRGB for matching, so they may differ slightly from the published originals.

Full MIT licence text

MIT License

Copyright (c) Tailwind Labs, Inc.

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.

Project home Used in Color Tools

material-colors

1.2.6 ISC

by Shuhei Kagawa

Supplies 256 values of the Material Design palette for nearest-name matching.

An independently maintained transcription of the Material Design palette. It is not published by Google.

Full ISC licence text

ISC License

Copyright 2014 Shuhei Kagawa

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
USE OR PERFORMANCE OF THIS SOFTWARE.

Project home Used in Color Tools

Open Color

1.9.1 MIT

by heeyeun

Supplies 132 palette values for nearest-name matching. An open-source palette designed for user-interface work.

Full MIT licence text

MIT License

Copyright (c) 2016 heeyeun

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.

Project home Used in Color Tools

Simple Icons
16.28.0 CC0 1.0

by the Simple Icons contributors

Seven of the eight brand logos in the Official socials list in the footer: GitHub, npm, X, Bluesky, Reddit, Instagram and TikTok.

Only the outline of each logo is included — none of the package's code, CSS or fonts. A CC0 dedication carries no attribution requirement; this credit is included because the page is meant to be a complete record. The logos themselves remain the trademarks of their respective owners, and are used here only to link to our own accounts on those services.

Dedicated to the public domain by its contributors
Full CC0 1.0 licence text
```
CC0 1.0 Universal — Public Domain Dedication

The person who associated a work with this deed has dedicated the work to the
public domain by waiving all of his or her rights to the work worldwide under
copyright law, including all related and neighbouring rights, to the extent
allowed by law.

You can copy, modify, distribute and perform the work, even for commercial
purposes, all without asking permission.

The full legal code is published at:
https://creativecommons.org/publicdomain/zero/1.0/legalcode
```
Project home Used in

Bootstrap Icons

1.13.1 MIT

by The Bootstrap Authors

The LinkedIn logo in the Official socials list in the footer.

One icon, and only its outline — none of the package's code, CSS or webfont. It is here rather than alongside the other seven because Simple Icons removed its LinkedIn logo following a trademark request, so no single set covers all eight. The logo remains the trademark of its owner, and is used here only to link to our own account.

Full MIT licence text

MIT License

Copyright (c) 2019-2024 The Bootstrap Authors

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.

Project home Used in

CSS Color Module — named colours
148 names W3C specification

by W3C

The colour names every browser already recognises, accepted on input and offered on output.

A published web standard, carrying no attribution requirement. It is listed here so that this page is a complete record.

Part of the open web platform

Project home Used in Color Tools

Colour systems that are not included

Individual colour values are measurements of fact, and facts are not subject to copyright. What can carry rights is a curated, named collection. For that reason, Color Tools includes only those collections whose authors have granted a licence permitting reuse, each of which is listed above.

A number of widely used colour systems — among them Pantone, RAL, HKS and NCS — are proprietary and are licensed commercially by their publishers. We have not included them, and we do not use their names within the interface, the underlying data or this site's metadata.

If your work depends on one of these systems, the publisher's own reference materials remain the authoritative source for accurate matching.

How we handle attribution

The MIT and ISC licences both require their copyright notice and permission text to accompany the work. We take that to mean the text must be served to the reader, not merely stored in our source repository, so each licence is reproduced in full on this page.

Where only the values of a colour palette are used, none of that project's source code is included in the site, and the entry above says so. We also maintain an internal engineering record of the exact package version, its origin and a SHA-256 checksum of each file, so that what is published here can be verified against what was actually obtained.

If your work is listed on this page and the attribution is incorrect or incomplete, we would be grateful to hear from you, and we will correct it as soon as possible.

Credits

qrcode-generator

xkcd colour survey

Tailwind CSS

material-colors

Open Color

Simple Icons

Bootstrap Icons

CSS Color Module — named colours

Colour systems that are not included

How we handle attribution