Color Blindness Check

Approximate RGB shifts for protanopia, deuteranopia, and tritanopia (Brettel-style simplification).

Red 0–255

Green 0–255

Blue 0–255

Tab to move between fields

Protan B

Protan R151

Protan G149

Deutan R129

Deutan G129

Deutan B50

Tritan R220

Tritan G60

Tritan B60

Rel. luminance93.294

How to Use This Calculator

Enter an RGB color value (0-255 for each channel) you want to test.
Review the simulated RGB values for protanopia, deuteranopia, and tritanopia.
Compare the shifted values to your original to check if your design colors are distinguishable for color-blind users.
Use the relative luminance value to assess WCAG contrast compliance.

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