WCAG Contrast Checker
Test text and background colours against WCAG 2.2 AA and AAA.
Runs entirely in your browser — no upload, no registration.
18.88 : 1
- ✅ WCAG AA (normal text)
- ✅ WCAG AAA (normal text)
The quick brown fox jumps over the lazy dog
What this tool does
Calculates the contrast ratio between your text and background colours using the WCAG relative-luminance formula, and shows AA / AAA passes for both normal and large text.
Why you might need it
Meets legal accessibility requirements (WCAG, ADA, EAA) and keeps type readable for users with low vision.
How to use it
- Pick text and background colours.
- Set the font size and weight.
- Read the AA / AAA verdict.
Always review the included licence before commercial use. Do not remove copyright records, designer names, licensing metadata or embedding restrictions from any font you process.