Color blindness simulator
See your palette through seven types of color vision. Free, no sign-up, works on phones.
How to use the color blindness simulator
How accurate is this?
It uses the Machado et al. (2009) model at full severity, with partial severity for the -anomaly types. It is a screening tool, not a diagnosis.
What should I change if colors look the same?
Increase lightness differences, add labels or patterns, and avoid relying on red versus green.
More: Color converter · Contrast checker · Palette generator · Gradient generator · Image color picker · Shades & tints generator · Random color
Need a full color system?
We design accessible brand palettes, UI tokens and style guides at a fixed price.