Accessibility Tools

Ship color choices everyone can use. WCAG 2.2 contrast checking, color-blindness simulation and automatic accessible alternatives.

Check the WCAG contrast ratio between any text and background color, with instant pass/fail grades and fix suggestions.

Full WCAG 2.2 AA and AAA compliance check for a color pair — normal text, large text and UI components.

Test how readable your text color is on your background at real sizes, with live sample paragraphs.

See any palette through protanopia, deuteranopia, tritanopia and achromatopsia.

Get a 0–100 accessibility score for your color combination based on WCAG thresholds.

Enter a color pair and get the nearest accessible alternative that passes WCAG AA.

Analyze contrast for your exact font sizes and weights — thresholds differ for large and bold text.

Test one text color against multiple candidate backgrounds at once.