Color Contrast Checker — Free Online Tool
Check color contrast ratios for WCAG accessibility compliance. Ensure your text is readable.
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Use Color Contrast CheckerQuick Facts
- 100% free — no signups
- Client-side processing
- No file size limits
- Works on all devices
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WCAG Color Contrast Requirements
WCAG (Web Content Accessibility Guidelines) requires minimum contrast ratios for text to ensure readability for users with visual impairments.
Contrast Ratio Requirements
- Normal text: AA = 4.5:1, AAA = 7:1
- Large text (18px+ bold or 24px+): AA = 3:1, AAA = 4.5:1
- UI components: AA = 3:1
Tips for Improving Contrast
- Use darker text on light backgrounds (or vice versa)
- Avoid gray text on gray backgrounds
- Consider color blindness — don't rely on color alone
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