Contrast Ratio Checker
Check WCAG contrast ratios between any two colors. Free accessibility tool.
All processing happens in your browser. Your data never leaves your device.
Sample Text (36px Bold)
Large text sample (18px)
Normal text sample (14px) - The quick brown fox jumps over the lazy dog.
12.63:1
Contrast Ratio
✓
AA Normal (4.5:1)
✓
AAA Normal (7:1)
WCAG Compliance Summary
✓ Pass - AA Normal
✓ Pass - AA Large
✓ Pass - AAA Normal
✓ Pass - AAA Large
How to Use
- 1Pick foreground and background colors.
- 2View the contrast ratio and live text preview.
- 3Check WCAG AA/AAA compliance.
What is Contrast Ratio Checker?
Contrast Ratio Checker calculates WCAG 2.1 contrast ratios between two colors and checks compliance levels for text accessibility.
Key Features
- WCAG 2.1 compliance
- Live text preview
- AA & AAA levels
- Color picker support
- Real-time calculation
- 100% client-side
Contrast Ratio Checker vs Other Tools
| Feature | Contrast Ratio Checker | Other Tools |
|---|---|---|
| Client-side processing | Yes | Varies |
| No signup required | Yes | Often required |
| Privacy-first (no data sent) | Yes | Rarely |
| Free & unlimited | Yes | Often limited |
| No ads interruption | Yes | Often no |
FAQ
Why is web accessibility important?
Web accessibility ensures that websites and tools are usable by everyone, including people with disabilities. It's both a legal requirement in many jurisdictions and a best practice for inclusive design.
What are WCAG guidelines?
WCAG (Web Content Accessibility Guidelines) provide a set of recommendations for making web content more accessible. They cover perceivability, operability, understandability, and robustness.