See how any color appears for 8 types of color vision deficiency
Approximately 8% of men and 0.5% of women have some form of color vision deficiency. The most common types are deuteranopia (red-green, green channel absent) and protanopia (red-green, red channel absent), each affecting around 1–2% of the male population. Tritanopia (blue-yellow deficiency) is rarer — around 0.003% — but significant for accessibility. Achromatopsia (complete color blindness) is extremely rare but results in vision limited entirely to lightness differences.
This simulator applies mathematically accurate transformation matrices to your chosen color, modeling what each cone-deficient visual system would perceive. The anomalous types (deuteranomaly, protanomaly, tritanomaly) represent partial deficiencies rather than complete absence — the affected channel is shifted rather than missing.
For designers: If a color combination looks similar across deuteranopia and protanopia, it is likely to cause confusion for a significant portion of your audience. The key principle is never to rely on color alone to convey meaning — use shape, pattern, or text labels alongside color distinctions. Check any color from PIGMENTUM's 16.7 million color pages using this tool.
Roughly 1 in 12 men and 1 in 200 women have some form of color vision deficiency. The most common types affect red–green perception (protanopia, deuteranopia), while blue–yellow (tritanopia) and total color blindness (achromatopsia) are rarer. Designers use simulations like this to check that important information never relies on color alone — a key WCAG accessibility requirement.