Color Blindness Simulator
Preview images and colors as seen by users with color vision deficiency
Drag & drop an image, or pick a sample
Upload an image or pick a color and see how it appears to users with the most common color vision deficiencies — protanopia, deuteranopia, tritanopia and full achromatopsia. An essential tool for designers building accessible UI and infographics.
How to simulate color blindness
Drop an image or pick a color to test.
View side-by-side how each color vision type perceives the input.
Use the insights to choose accessible colors and patterns.
Protanopia, deuteranopia, tritanopia and their milder anomalous variants, plus achromatopsia.
Upload your design or screenshot to see all simulations side-by-side.
Pick a single color and see how each deficiency perceives it.
Images are processed in canvas locally — never uploaded.