Your colours
Simulations use the severity 1.0 matrices of Machado, Oliveira and Fernandes (2009), applied in linear RGB. They are approximations and not a substitute for testing with colour-blind players. Hover a swatch to see its simulated hex code.
More tools
To find colour pairs that are hard to tell apart and check text contrast, open the full palette checker. For a single text and background pair, use the color contrast checker.
Reference: Color blindness on Wikipedia.
Palette pack (pay what you want)
This simulator stays free and complete. If you also want ready-made palettes, we offer a pack called "Colour-blind-safe palette pack: 12 measured palettes for game UI". Pay what you want, $0 minimum. Payment is optional.
- 12 palettes of 4, 6 and 8 colours, each as its own GIMP palette file named like cb4-any.gpl.txt.
- A CSV, a static swatch page in HTML, a measurement report and a README.
- The report lists, for each palette, the measured minimum CIEDE2000 difference under normal vision, protanopia, deuteranopia and tritanopia.