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Color Contrast Audit

Paste a palette and run live WCAG-based contrast checks with pass/warning/fail recommendations for every pair.

What this tool does

Color Contrast Audit helps you paste a palette and run live WCAG-based contrast checks with pass/warning/fail recommendations for every pair.

What you get

Color Contrast Audit produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.

Shipped

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Palette colors

Enter one color per line. Hex, rgb(), hsl(), and named CSS colors are supported.

WCAG target

Current requirement: at least n/a contrast.

#000000

#ffffff

#777777

Pair summary

Live updates from 3 color pair checks

Pass

Warning

Fail

Invalid inputs

#000000 ⟷ #ffffff

PASS

Ratio: 21.00:1

Requirement: >= 4.50:1

Pair key: #000000-#ffffff

#000000 ⟷ #777777

PASS

Ratio: 4.69:1

Requirement: >= 4.50:1

Pair key: #000000-#777777

#ffffff ⟷ #777777

WEAK

Ratio: 4.48:1

Requirement: >= 4.50:1

Pair key: #ffffff-#777777

Recommendation: Try background #757575 for 4.6:1 contrast.

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.