Color Blindness Simulator
Simulates how an image looks with protanopia, deuteranopia, tritanopia or full achromatopsia, using physiologically-based color matrices — the fastest way to check whether a chart, map or UI still works without red-green discrimination.
Runs 100% in your browser — images never leave your device.
Read the full guide to this tool
Notes
- About 8% of men and 0.5% of women have some form of red-green color vision deficiency.
- The simulation uses the Brettel/Viénot linear-RGB transforms, the standard model for dichromat vision.
- Everything runs locally in your browser; your images are never uploaded to any server.
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