Color Blindness Simulator
Experience your designs the way color-blind users see them. Upload an image (or use the built-in test pattern) and view side-by-side simulations of protanopia, deuteranopia, tritanopia, their anomalous variants, and total achromatopsia. Simulate individual colors too — a fast way to check charts, alerts and brand colors for accessibility.
How to use Color Blindness Simulator
Add an image
Upload any image or keep the built-in color test pattern.
View the simulations
See the image as someone with each type of color vision deficiency sees it.
Check a single color
Simulate any hex value and inspect the resulting colors.
Color blindness simulator
The pattern above is drawn in your browser — nothing is uploaded. Each grid cell below simulates how that image appears to someone with the listed condition.
Simulated views
Simulated views appear here once the pattern is ready.
Simulate a single color
Click a simulated swatch to inspect it in the color converter. Around 1 in 12 men (and 1 in 200 women) have some form of color vision deficiency — mostly red-green (protan & deutan).
Key Features
- 7 simulations: 3 anopia + 3 anomaly + achromatopsia
- Upload any image, or use the built-in test pattern
- Side-by-side grid of all variants
- Download any simulated image as PNG
- Simulate single colors for quick checks
- 100% client-side — images never upload
Common Use Cases
- Check data-viz charts for color-blind readability
- Verify alert and status colors still distinguish
- Design accessible brand palettes
- Understand what color-blind users actually see
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