Color Contrast Checker
Check the contrast ratio between a text color and background color against WCAG 2.1 AA and AAA accessibility standards, with a live text preview.
The quick brown fox
jumps over the lazy dog. 0123456789
14.68:1
Based on the WCAG 2.1 relative luminance and contrast ratio formulas. AA is the baseline accessibility standard most sites should meet; AAA is stricter and recommended for important content.
Frequently asked questions
What contrast ratio do I need to pass WCAG AA?+
At least 4.5:1 for normal text, or 3:1 for large text (18pt+, or 14pt+ bold).
What's the difference between AA and AAA?+
AA is the standard baseline most sites aim for; AAA is a stricter, enhanced standard (7:1 for normal text) recommended for critical or high-readability content.
Is this a legal compliance tool?+
It checks against the WCAG 2.1 contrast formula, a common reference point for accessibility compliance, but isn't a substitute for a full accessibility audit.