← Tools Color Blindness Simulator Brettel / Vienot
+ Add Colors
Simulated Views
Upload an Image

Drop an image here or click to upload

PNG, JPG, WEBP up to 10 MB
WCAG Contrast Checker
--
Contrast Ratio
Large Text (18pt+)
Small body text at 14px for readability testing.
Under CVD Simulation
Find Accessible Alternatives

Enter a color pair that fails WCAG contrast. The tool will suggest nearby alternatives that pass AA and AAA thresholds.