WCAG Contrast Checker
Pick a foreground and background color to instantly see the contrast ratio and whether it passes WCAG AA/AAA accessibility standards.
Sample text
AA (normal)
AAA (normal)
AA (large)
AAA (large)
Pourquoi utiliser cet outil ?
Text with insufficient contrast against its background is hard to read, especially for visually impaired users, and can fail accessibility audits. This tool computes the exact WCAG contrast ratio between two colors and checks it against the AA and AAA thresholds, for normal and large text, live.
Why it's free
A discreet ad banner covers hosting costs — that's the whole business model. No account to create, no usage limit, no paid tier unlocking the real result. Calculations run in your browser, so your numbers, dates and text never leave your device.
How our tools work