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Deuteranopia Simulator
See how a photo, chart or design looks to someone with deuteranopia: no working green (M) cones, the most common strong form: red and green look alike, both turning beige or olive.
The full-strength views use the Viénot, Brettel & Mollon (1999) model of dichromat vision; lower strengths blend towards normal vision to approximate the milder, more common “-anomaly” types. Wondering about your own eyes? Take the Color Blind Test.
About the Color Blind Simulator
The color blind simulator shows how an image looks to people with each main type of color blindness. Upload a photo, paste a screenshot or use the built-in sample, then switch between deuteranopia, protanopia, tritanopia and achromatopsia, and lower the strength to see the milder, more common forms. Designers can use it to check that charts, maps and buttons still work without color. Everything runs in your browser; the image is never uploaded.
How to use it
- 1 Choose a photo, drop it in, or paste a screenshot.
- 2 Pick a type of color blindness.
- 3 Lower the strength to see the milder form, or keep it full.
- 4 Compare side by side or with the split slider, and download the result.
Frequently asked questions
What does someone with Deuteranopia see?
Deuteranopia means no working green (M) cones, the most common strong form: red and green look alike, both turning beige or olive.
How do I make a chart color blind friendly?
Don’t rely on red against green. Use colors that differ in lightness as well as hue, such as blue and orange, add labels, patterns or shapes, and check the chart in this simulator in deuteranopia and protanopia.
How accurate is the simulation?
Full strength uses the Viénot, Brettel and Mollon model of dichromat vision, which is widely used and matches what people with dichromacy report well. Lower strengths blend towards normal vision, which is a reasonable stand-in for the milder anomalous types.
Is my image uploaded?
No. The image is processed on a canvas in your browser and never leaves your device.
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