See how your colors appear to people with color vision deficiency. Simulate deuteranopia, protanopia, tritanopia, and achromatopsia — and check if your palette is distinguishable across all types.
Original
Deuteranopia
~6% of males
Protanopia
~2% of males
Tritanopia
~0.01% of people
Achromatopsia
~0.003% of people
Missing or non-functional M (medium-wave, green-sensitive) cones. Reds and greens are difficult to distinguish.
Most common type of color blindness
Missing or non-functional L (long-wave, red-sensitive) cones. Reds appear darker and are confused with greens.
Second most common type
Missing or non-functional S (short-wave, blue-sensitive) cones. Blues and yellows are difficult to distinguish.
Rare, affects both sexes equally
Complete absence of cone function. Only brightness (luminance) is perceived — no hue or saturation information.
Extremely rare; design for this ensures strong luminance contrast
Test a full palette
Paste up to 8 hex codes to see how your entire palette reads under each deficiency type.
Use shape, pattern, or text labels alongside color to convey information. Charts and status indicators should never rely solely on hue.
Strong light-dark contrast is perceivable by everyone. Even full achromatopsia preserves luminance — so a high-contrast palette is always accessible.
Red/green pairs are the most commonly confused. For data visualization, prefer blue/orange or purple/yellow combinations that remain distinct under deuteranopia.
