WCAG Contrast Checker — Free
Check the contrast ratio between a text color and a background color. See instantly if it meets WCAG AA and AAA accessibility standards.
Aa
Sample text on this background
Text color (foreground)
Background color
Contrast Ratio
4.47:1
Overall
Large only
| Level | Normal text | Large text (18pt+) | Required |
|---|---|---|---|
| WCAG AA | ✗ Fail | ✓ Pass | 4.5:1 / 3:1 |
| WCAG AAA | ✗ Fail | ✗ Fail | 7:1 / 4.5:1 |
Quick examples
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WCAG 2.1 compliance
Tests against AA (4.5:1) and AAA (7:1) for normal text, and AA (3:1) for large text.
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Live preview
See exactly how text looks on the background as you pick colors.
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Real-time
Ratio and pass/fail update instantly. No button to press.