Color Contrast Ratio Checker
Color Contrast Ratio Checker is a Firefox extension that calculates WCAG 2.1 contrast ratios between two hex colors. It helps designers and accessibility testers evaluate color combinations for readable, accessible interfaces, including on Firefox for Android.
Overview
6 featuresColor Contrast Ratio Checker is a Colour pickers & palettes project. It focuses on checking whether color combinations meet WCAG contrast accessibility requirements. It is built as a consumer product for web designers and accessibility testers. Color Contrast Ratio Checker is free to use. It ships for the web, embeddable surfaces, and Android.
It is developed by Lumi, and it first shipped in 2026. Among its 6 catalogued features are hex color input, contrast ratio calculation, and WCAG 2.1 checks. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
- Hex color input
- Contrast ratio calculation
- WCAG 2.1 checks
- Firefox extension
- Firefox for Android
- No data collection
Built with & integrations
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
- Indexed8 Sept · 00:34 UTCColor Contrast Ratio Checker verified via Firefox Add-onsSource: Firefox Add-ons · Open
Frequently asked questions about Color Contrast Ratio Checker
- What does Color Contrast Ratio Checker do?
- Color Contrast Ratio Checker focuses on checking whether color combinations meet WCAG contrast accessibility requirements. It is catalogued under Colour pickers & palettes on PulseGate.
- Who is Color Contrast Ratio Checker for?
- Color Contrast Ratio Checker is a consumer product built for web designers and accessibility testers.
- Does Color Contrast Ratio Checker have a free plan?
- Yes — Color Contrast Ratio Checker is free to use.
- What platforms does Color Contrast Ratio Checker run on?
- Color Contrast Ratio Checker runs on the web, embeddable surfaces, and Android.
- Is Color Contrast Ratio Checker still maintained?
- Unverified. Color Contrast Ratio Checker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- What projects are similar to Color Contrast Ratio Checker?
- Similar projects tracked by PulseGate include ColorContrast, Color Contrast checker, and A11yKit.ColorContrastColor Contrast checkerA11yKit
- Who develops Color Contrast Ratio Checker?
- Color Contrast Ratio Checker is developed by Lumi.
- When did Color Contrast Ratio Checker launch?
- Color Contrast Ratio Checker first shipped in 2026.
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