Free Online Tool
Blindness Simulator
See how any color appears with 8 types of color vision deficiency — 8% of men are affected.
Simulations are approximations (Machado et al. 2009). Click any swatch to copy its hex.
Design for everyone
Red-green deficiency (protanopia, deuteranopia and their partial forms) is the most common. Never encode meaning in color alone — pair it with contrast, labels or patterns. Simulations here follow the Machado et al. (2009) model.
Pair this with the contrast checker, or probe colors from an image.