Color Blindness Simulator
Free online color blindness simulator. See how images and colors look to people with protanopia, deuteranopia, tritanopia, and achromatopsia. 100% client-side.
Protanopia
Red-blind. Difficulty perceiving red light. Reds appear darker or brownish, and distinguishing red from green is challenging.
Color Test
Top: original, Bottom: simulated under Protanopia
About Color Blindness
Protanopia
Red-blind. Difficulty perceiving red light. Reds appear darker or brownish, and distinguishing red from green is challenging.
Deuteranopia
Green-blind. Difficulty perceiving green light. Greens and reds appear similar, often resulting in a muted brown/yellow palette.
Tritanopia
Blue-blind. Difficulty distinguishing blue from green and yellow from violet. Blue light perception is reduced.
Achromatopsia
Total color blindness. No cone function — only shades of gray, black, and white are perceived (monochrome vision).