Images

See a photo the way a color blind person would

Upload an image, compare it against three common types of color blindness at once. Everything runs in your browser — nothing is uploaded.

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Upload an image
JPG · PNG · WebP
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Side by side

Roughly 1 in 12 men and 1 in 200 women have some form of color blindness — if a chart or design relies on red versus green alone to make its point, this is what that looks like for them.

Common questions

What do these three types actually mean?
Protanopia and deuteranopia both affect red-green perception and are the most common forms, together affecting a meaningful share of men. Tritanopia, affecting blue-yellow perception, is much rarer.
Why does this matter for a design or chart, not just a photo?
A common accessibility mistake is using red versus green as the only way to distinguish two things on a chart or interface — to someone with red-green color blindness, those can look nearly identical. This tool shows you that directly instead of asking you to imagine it.
Is this simulation exactly what a color blind person sees?
It’s a well-established approximation, not a perfect one — actual color perception varies by individual and by severity, even within the same type. It’s accurate enough to catch real accessibility problems, not a medical-grade simulation.