Accessibility Tool

Color Contrast
Checker

Instantly check if your foreground and background colors meet WCAG 2.1 accessibility standards. No dependencies — pure math.

Color Inputs

Quick Presets

Contrast Ratio
AA Normal
Body text & UI
Needs 4.5:1
AA Large
18pt+ or 14pt bold
Needs 3:1
AAA Normal
Enhanced body text
Needs 7:1
AAA Large
Enhanced large text
Needs 4.5:1
Live Preview
The quick brown fox
This is how your body text will appear with these color choices. Readable text is essential for a great user experience.
Small text at 12px — captions, footnotes, labels. Always test small sizes too.
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