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Color Contrast Checker

Check contrast ratios against WCAG AA and AAA accessibility standards. Test any foreground/background color combination.

Contrast Ratio
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The quick brown fox jumps over the lazy dog
Foreground (Text)
Background
Quick pairs:

Frequently Asked Questions

What is WCAG AA compliance?
WCAG AA (Level 2) requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18pt or 14pt bold). This is the standard required by most accessibility laws including the ADA, EN 301 549 and WCAG 2.1.
What is WCAG AAA compliance?
WCAG AAA (Level 3) is the highest standard, requiring 7:1 for normal text and 4.5:1 for large text. While ideal, AAA is not always achievable for all text and is not legally required.
What counts as large text?
Text is considered large if it is 18pt (24px) or larger, or 14pt bold (approximately 18.67px bold) or larger. Large text has lower contrast requirements because it is inherently easier to read.
Done!