Color Blindness Simulator
Preview how an image looks to people with protanopia, deuteranopia, or tritanopia.
How to Use
- Drop a design or photo.
- Toggle between the three simulation modes.
- Compare side-by-side with the original.
Image
👁
Drop image
Preview
Types
Protanopia
Missing L-cones; reds darken/confuse with green
Deuteranopia
Missing M-cones; most common form
Tritanopia
Missing S-cones; rare blue-yellow confusion
Achromatopsia
Total color blindness — grayscale
Frequently Asked Questions
Are these accurate?
Uses the Brettel / Viénot matrix model — close for dichromacy, approximate for real-world anomalies. Enough to catch red-green failures in UI.
Common Use Cases
UI accessibility
Verify charts and status indicators remain readable.
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