Test whether a text and background colour pair is readable enough. Enter the two colours to get the exact contrast ratio and pass/fail badges for WCAG AA and AAA, at normal and large text sizes, with a live sample. All computed locally.
Color Contrast Checker converts instantly and accurately in your browser, showing every unit or format side by side so you can copy the one you need.
WCAG AA needs 4.5:1 for normal text and 3:1 for large text; AAA needs 7:1 and 4.5:1 respectively.
Roughly 18pt (24px), or 14pt (18.66px) bold, and larger.
No — the math runs in your browser.
The quick brown fox
jumps over the lazy dog
14.68:1