WCAG Color Contrast Checker
Colors → Ratio
Calculate color contrast ratios for text and background colors against WCAG 2.1 AA and AAA accessibility standards.
About this tool
About WCAG Color Contrast Checker
WCAG Color Contrast Checker is a free, browser-based tool that lets you calculate color contrast ratios for text and background colors against WCAG 2.1 AA and AAA accessibility standards. It supports Colors → Ratio. Everything runs locally on your device, so your files are never uploaded to a server. There's no sign-up, no watermark, and no limit — just open WCAG Color Contrast Checker, add your input, and get results instantly.
How to use WCAG Color Contrast Checker
1
Pick Colors
Select foreground text and background colors.
2
Check WCAG Ratio
Calculates contrast ratio and AA/AAA compliance badges.
Key features
Accessibility Pass/Fail
Ensure your UI colors meet web accessibility guidelines.
100% Private
WCAG Color Contrast Checker processes your data locally in the browser. Nothing is uploaded, tracked, or stored u2014 your files never leave your device.
Completely Free
Use WCAG Color Contrast Checker as much as you want with no fees, no watermarks, and no hidden limits.
No Installation
WCAG Color Contrast Checker runs in any modern browser. There's nothing to download, install, or configure.
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