Color Blindness Simulator

Color blindness (color vision deficiency) is the reduced ability to distinguish between certain colors. It affects about 8% of men and 0.5% of women. The most common types involve difficulty distinguishing red and green hues.

These simulations use scientifically-derived color transformation matrices that model how colors appear to people with different types of color vision deficiency. While no simulation is 100% perfect, these matrices are widely used in accessibility research and give a reliable approximation.

Types ending in '-anopia' (e.g., Protanopia) represent complete absence of a cone type, resulting in more severe color confusion. Types ending in '-anomaly' (e.g., Protanomaly) represent a shifted sensitivity, producing a milder form of the deficiency.

Roughly 1 in 12 men has some form of color vision deficiency. Designing with color blindness in mind ensures your content is accessible to all users. Never rely on color alone to convey information — use labels, patterns, or icons as well.

Achromatopsia (total color blindness) is a rare condition where a person sees no color at all — only shades of gray. It is caused by a complete absence or non-function of cone cells in the retina.