Simulate color vision
Upload an image to preview four types of color vision deficiency.
Upload an image or pick a color to start.
Check your designs with the Colorblind Simulator. Upload an image to preview protanopia, deuteranopia, tritanopia and monochrome vision.
Upload an image to preview four types of color vision deficiency.
Each pixel's RGB values are multiplied by a color-vision-deficiency matrix, a standard approximation used in accessibility research. Protanopia and deuteranopia shift red-green perception, tritanopia shifts blue-yellow, and achromatopsia removes color entirely. The image is downscaled for speed, so large photos simulate in seconds.
Upload screenshots, charts or infographics to see whether meaning survives without full color. If two colors become identical under deuteranopia, add labels, patterns or brightness differences so the information is not color-only.