Color Blindness Simulator
Upload any image to see how it appears to people with different types of color vision deficiency — Protanopia, Deuteranopia, Tritanopia, and Achromatopsia. Simulations use pixel-level color matrix transforms in your browser, so nothing is uploaded to a server. Essential for designing accessible UIs that work for the ~8% of males with some form of color blindness.
Types of color blindness
- Protanopia — red-blind; no functioning L-cones. Affects ~1% of males. Red and green are confused.
- Deuteranopia — green-blind; no M-cones. The most common form, affecting ~1% of males. Similar confusion of red and green.
- Tritanopia — blue-blind; no S-cones. Rare (<0.01%). Blue-yellow axis is affected.
- Achromatopsia — complete color blindness; only brightness is perceived. Very rare.
How the simulation works
Each pixel's RGB values are multiplied by a 3×3 transformation matrix derived from the cone response model. All processing happens in your browser — no image data is uploaded to any server.
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