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# Color blindness simulator for design review

See how colors and images look to people with common kinds of color blindness.
Color pairImageMachado et al. 2009 severity-1.0 matrices · a design review aid, never a medical diagnosisClearon

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Original · #d6336c on #ffffff · 4.61 :1

Each panel shows the simulated pair and the WCAG contrast of the SIMULATED colors: what a viewer with that color vision experiences, not the original ratio. The matrices are the published Machado, Oliveira & Fernandes (2009) linear-RGB approximations at full severity, with Rec. 709 luma for achromatopsia. Simulation is a design review aid and cannot predict any individual's vision. It is not a medical diagnosis or a clinical test.

## More color tools

- [Contrast checker](/color/contrast)
- [Color converter & contrast](/color/converter)
[All color tools](/color)

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Canonical HTML: https://nutter.tools/color/blindness/
Markdown version: https://nutter.tools/color/blindness/index.md
Plain-text version: https://nutter.tools/color/blindness/index.txt
Agent index: https://nutter.tools/llms.txt