This tool shows both the classic WCAG contrast ratio and an APCA score. WCAG tells you whether a pair meets AA/AAA thresholds, while APCA (Advanced Perceptual Contrast Algorithm) is a newer standard that more closely matches how humans perceive contrast in real interfaces.
Colors
Text
Background
Accessibility Examples
Preview
Sample Text
This is how your text will appear with the selected colors.
Accessible
Ratio 21:1
Great! Your color combination meets WCAG guidelines.
This contrast ratio ensures your text is readable for users with visual impairments, including those with color blindness or low vision.
Learn more about accessibility best practices in our blog.
🚀 Go further with colorStudio Pro
Start here with the free contrast checker, then send your best combinations into colorStudio for palette-wide fixes, exports, and Pro workflows.
Fix failing background colors without breaking your brand
APCA & AAA scoring that matches colorStudio
Palette-wide accessibility fixes in one place
Export-ready tokens for VS Code & Figma
Detailed accessibility reports for teams
Save and share results across projects
How to check color contrast for accessibility
1. Select Colors
Choose your text and background colors using the color picker, eyedropper tool, or try our accessibility examples.
2. Get Instant Results
See your contrast ratio, WCAG compliance level, and accessibility status in real-time as you adjust colors.
3. Fix & Export
Use our "Free Contrast Checker" tool to automatically improve colors, then export or share your results.
Why choose weableColor's contrast checker?
Our free contrast checker uses the latest WCAG 2.1 guidelines and provides instant, accurate results. Unlike basic tools, we offer intelligent color fixing and comprehensive accessibility analysis.
- WCAG 2.1 AA & AAA Compliance
Test against the latest accessibility standards
- Instant Color Fixing
Automatically suggest better color combinations
- Real-time Analysis
See results as you type or adjust colors
- Export & Share
Download reports or share results with your team
Try it yourself
Test any color combination above to see how our tool works
Need more advanced features?
Upgrade to weableColor Pro for advanced accessibility tools and intelligent color fixing
Intelligent Background Fixing
Automatically fix background colors while maintaining your design aesthetic and brand colors.
APCA Lc Scores
Get next-generation contrast scores using the APCA (Advanced Perceptual Contrast Algorithm) standard.
Palette-Wide Fixes
Fix entire color palettes at once, ensuring all combinations meet accessibility standards.
Detailed Reports
Export comprehensive accessibility reports with recommendations and compliance documentation.
Frequently asked questions
How accurate is the contrast ratio calculation?
Our tool uses the official WCAG 2.1 contrast ratio formula, ensuring 100% accuracy with the standards used by accessibility auditors and compliance testing tools.
Can I test colors from my design files?
Yes! Use the eyedropper tool to sample colors directly from any design file, website, or image. The tool works with all major browsers and supports both desktop and mobile.
What's the difference between WCAG AA and AAA?
WCAG AA requires a contrast ratio of 4.5:1 for normal text and 3:1 for large text. AAA requires 7:1 for normal text and 4.5:1 for large text. AAA provides better accessibility but is harder to achieve.
Is this tool really free to use?
Yes! Our basic contrast checking is completely free with no usage limits. We offer Pro features for advanced users who need background fixing, APCA scores, and detailed reporting.