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WCAG Color Contrast Checker

Check if your foreground/background color combination meets WCAG AA and AAA accessibility standards.

Large Text Sample (18pt / 14pt bold)
Normal text sample (16px regular weight)
Contrast Ratio
WCAG AA
WCAG AAA

Color Contrast Checker — Frequently Asked Questions

It measures the difference in brightness between text and background. WCAG requires at least 4.5:1 for normal text and 3:1 for large text.

Sufficient contrast makes content readable for users with low vision or color blindness and improves overall usability.

It checks both AA and AAA compliance for normal and large text against the official WCAG 2.1 thresholds.