Color Blindness Simulator
Upload an image → see how it looks with protanopia, deuteranopia, tritanopia, achromatopsia.
About Color Blindness Simulator
The color blindness simulator shows how an image appears to people with different types of color vision deficiency. Upload an image and the tool renders versions for protanopia, deuteranopia, tritanopia, and achromatopsia.
This helps designers and developers check whether a chart, interface, or graphic still communicates clearly when red, green, or blue perception is reduced. Use it to catch problems like status colors that become indistinguishable. The simulation runs in your browser, so your image is processed on your device.
Frequently asked questions
- What do protanopia and deuteranopia mean?
- They are forms of red-green color blindness. Protanopia reduces sensitivity to red light and deuteranopia reduces sensitivity to green.
- How is this useful for accessibility?
- It reveals whether a design relies on color alone. If important information disappears in a simulation, you may need labels or patterns as well.
- Is achromatopsia the same as grayscale?
- Achromatopsia is total color blindness, so the simulated view is close to a grayscale image where only brightness differences remain.