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