Color Blindness Simulator

Simulate color blindness using LMS transformation

Color Input
Simulated View
#8B5CF6
Protanopia (Red-Blind)

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What is Color Blindness Simulation?

Color blindness simulation uses LMS (Long, Medium, Short) cone response matrices to transform colors. It shows how people with different types of color vision deficiency perceive colors. This helps designers create accessible interfaces that work for everyone, including the 8% of men with color blindness.

Frequently Asked Questions

What's the difference between types?
Protanopia (red-blind): difficulty with red light. Deuteranopia (green-blind): difficulty with green light. Tritanopia (blue-blind): difficulty with blue light. Achromatopsia: complete color blindness (monochrome vision).
How does LMS simulation work?
RGB values convert to LMS cone response space. Matrix multiplication applies deficiency filters, then converts back to RGB. This mathematically models how missing or altered cones affect color perception.
Why test for color blindness?
To ensure UI elements aren't distinguishable only by color. Critical information (errors, links) should use icons or patterns. WCAG guidelines recommend not using color as the only visual cue.