Free Color Contrast Checker Tool – WCAG Accessibility Compliance

Check Color Contrast

Color contrast is crucial for accessibility. Our free color contrast checker verifies your color combinations meet WCAG (Web Content Accessibility Guidelines) standards, ensuring text is readable for users with visual impairments.

Why Color Contrast Matters

Color contrast determines text readability. Poor contrast makes content difficult or impossible to read for users with visual impairments, color blindness, or viewing in bright sunlight. WCAG standards ensure text is accessible to everyone.

WCAG Contrast Requirements

• Normal Text (AA): Requires 4.5:1 contrast ratio for standard text sizes (less than 18pt or 14pt bold).
• Normal Text (AAA): Requires 7:1 contrast ratio for enhanced accessibility.
• Large Text (AA): Requires 3:1 contrast ratio for large text (18pt+ or 14pt+ bold).
• Large Text (AAA): Requires 4.5:1 contrast ratio for large text at enhanced level.

How to Use This Tool

1. Select Background Color: Choose the background color for your text.
2. Select Text Color: Choose the foreground text color.
3. View Preview: See how your color combination looks in the preview area.
4. Check Results: Review WCAG compliance results for different text sizes.
5. Adjust Colors: Modify colors until you achieve passing contrast ratios.
6. Implement: Use passing color combinations in your design.

Best Practices for Color Contrast

• Always Test Contrast: Don’t assume colors work—always verify with a contrast checker.
• Consider Context: Light backgrounds with dark text or dark backgrounds with light text typically work best.
• Aim for AAA: While AA meets minimum standards, AAA provides better accessibility.
• Test Multiple Combinations: Different color pairs may work better for different content types.
• Check in Different Conditions: Consider how colors appear in various lighting conditions.
• Account for Color Blindness: Don’t rely solely on color differences—use contrast and other indicators.

Common Contrast Mistakes

• Low Contrast Text: Gray text on white or white text on light gray fails accessibility standards.
• Color-Only Indicators: Using color alone to convey information excludes color-blind users.
• Ignoring Large Text: Assuming all text requires the same contrast ratio.
• Not Testing: Guessing contrast ratios instead of using measurement tools.

Frequently Asked Questions

What is a good contrast ratio?

For normal text, aim for at least 4.5:1 (AA standard) or 7:1 (AAA standard). For large text, 3:1 (AA) or 4.5:1 (AAA) is sufficient.

Do I need to meet AAA standards?

AA is the minimum legal requirement for most websites. AAA provides enhanced accessibility and is recommended for better user experience.

What counts as large text?

Text at least 18pt regular or 14pt bold qualifies as large text with lower contrast requirements.

Can I use decorative text with low contrast?

Decorative text that doesn’t convey information can have lower contrast, but functional text must meet WCAG standards.