Licenses

Our Own License

OmniColor's original code, content and design are protected by copyright. See our Copyright Policy for details on what you may and may not do with our content.

Fonts

Inter

Version: 4.0
Author: Rasmus Andersson
License: SIL Open Font License 1.1
URL: github.com/rsms/inter
Usage: Primary UI and body text font

The SIL Open Font License allows the font to be used, studied, modified and redistributed freely as long as it is not sold by itself. Fonts bundled with documents may be embedded and redistributed.

JetBrains Mono

Version: 2.304
Author: JetBrains
License: SIL Open Font License 1.1
URL: github.com/JetBrains/JetBrainsMono
Usage: Monospace font for code blocks and color values

Color Systems

CSS Named Colors (W3C)

Source: W3C CSS Color Module Level 4
License: W3C Document License
URL: w3.org/TR/css-color-4
Usage: The 148 CSS named colors reference

The W3C Document License permits reuse of W3C specifications with attribution. Color values themselves are not copyrightable.

Tailwind CSS Colors

Version: 3.x
Source: Tailwind Labs
License: MIT License
URL: github.com/tailwindlabs/tailwindcss
Usage: Reference in Tailwind Color Generator

MIT License permits commercial use, modification and distribution with attribution.

Bootstrap Colors

Version: 5.3
Source: Bootstrap Team
License: MIT License
URL: github.com/twbs/bootstrap
Usage: Reference in Bootstrap Color Generator

Material Design Colors

Version: Material Design 3
Source: Google
License: Apache License 2.0
URL: m3.material.io
Usage: Reference in Material Color Generator

Apache 2.0 permits commercial use, modification, distribution with attribution and preservation of copyright notices.

Algorithms and Formulas

WCAG 2.2 Contrast Ratio

Source: W3C Web Content Accessibility Guidelines
License: W3C Document License
URL: w3.org/TR/WCAG22
Usage: Contrast ratio calculation in all accessibility tools

CIE Lab / Delta E

Source: International Commission on Illumination (CIE)
Usage: Perceptual color difference calculation
Note: CIE color spaces and Delta E formulas are open standards

Brettel/Viénot CVD Matrices

Source: Brettel, Viénot & Mollon (1997); Viénot, Brettel & Mollon (1999)
Usage: Color blindness simulation
Note: These are published scientific matrices used for design simulation

Hosting and Infrastructure

Cloudflare Pages

Source: Cloudflare, Inc.
Usage: Static site hosting and CDN
Note: Cloudflare's terms govern their infrastructure service

Advertising Networks

Adsterra

Source: Adsterra
Usage: Display advertising network (opt-in only)
Privacy: adsterra.com/privacy-policy

Google AdSense

Source: Google LLC
Usage: Display advertising network (opt-in only, when enabled)
Privacy: policies.google.com/technologies/ads

Images and Illustrations

All images on OmniColor are one of the following:

• Created by the OmniColor team specifically for the site
• Generated programmatically (color swatches, palettes, gradients)
• SVG icons hand-drawn for OmniColor (no third-party icon library)
• Open Graph social previews created for the site

We do not use stock photos, third-party illustrations or icon libraries (no Font Awesome, no Heroicons, no Feather Icons — all icons are custom SVG).

Third-Party Code

OmniColor is built entirely with vanilla JavaScript and does not include any third-party JavaScript libraries. There is no jQuery, no React, no Vue, no Lodash, no D3, no Chart.js, and no npm dependencies in production.

This significantly reduces our license obligations and attack surface. If you find any third-party code in our production JavaScript, please let us know at legal@omnicolor.pages.dev — it would be an oversight.

Attribution Requirements

When required by license, we provide attribution:

• Inter font: Used per SIL OFL 1.1 — attribution to Rasmus Andersson
• JetBrains Mono: Used per SIL OFL 1.1 — attribution to JetBrains
• Tailwind/Bootstrap: Used per MIT — attribution to their respective teams
• Material Design: Used per Apache 2.0 — attribution to Google
• W3C specifications: Referenced per W3C Document License — attribution to W3C

All attribution is included in the source code where the licensed material appears.

How to Report License Issues

If you believe any content on OmniColor is used without proper license, please contact us immediately:

• Email: legal@omnicolor.pages.dev
• DMCA: DMCA Policy

We take license compliance seriously and will investigate every report promptly.

License Updates

This page is reviewed and updated whenever we add or remove third-party software. The "Last updated" note at the top reflects the most recent change.

Last updated: November 2026