WCAG Contrast Checker
Color blindness accessibility test · AA / AAA ratios · simulate CVD on the same canvas
Upload a design or enter a URL
See how your work looks to people with deuteranopia, protanopia, tritanopia, or achromatopsia. Nothing is sent to a server all processing is done in your browser.
Drop your image here, or click to browse
PNG · JPG · GIF · WebP · SVG up to 10 MB
Pro Tips
- Use high-resolution images (800px+) for clearer results
- Focus on UI elements that rely on color to convey information
- Charts, status indicators, and CTAs are the highest-risk areas
- 8% of men and 0.5% of women have some form of CVD
Color Blind Accessibility Checker
A color blind accessibility checker should verify contrast under simulated CVD—not only on “normal” vision. Upload a screenshot or enter a URL, pick two points, and read WCAG 2.2 pass/fail for AA and AAA while previewing protanopia, deuteranopia, or tritanopia.
Full simulator features live on color blind simulator. Screen personal vision with the free color blind test.