Color Blindness Simulator

Simulate color blindness for accessibility testing

About 8% of men and 0.5% of women have some form of color vision deficiency. Use this tool to check how your designs look to people with deuteranopia (most common), protanopia, tritanopia, or achromatopsia. All processing uses a color matrix algorithm applied directly in your browser — no image is uploaded. For checking color contrast ratios, try Color Contrast Checker. To generate an accessible color palette, use Color Palette Generator.