Color Blindness Simulator
See how a picture, chart or design looks with each type of color blindness. Free, and it runs on your device.
Color Blindness Simulator shows how a picture may look to people with color vision deficiency, which affects roughly 1 in 12 men and 1 in 200 women. Use it to check that charts, maps, buttons and designs still make sense when red and green, or blue and yellow, are hard to tell apart. It covers seven types, based on a published scientific model.
How to use Color Blindness Simulator
- 1
Add your picture
Drop or choose a chart, screenshot, design or photo.
- 2
Choose a type
Switch between the types, and back to the original to compare.
- 3
Download if you like
Save the simulated picture as a PNG to share with your team.
What it does
- Seven types
- Red, green and blue weakness and absence, plus no color at all.
- Based on research
- Uses the model of Machado, Oliveira and Fernandes (2009).
- Private
- Your picture is processed on your device and never uploaded.
Questions
Which type is most common?
Deuteranomaly, a reduced sensitivity to green, is by far the most common.
Is this exactly what a color-blind person sees?
It's a close estimate. Color vision varies from person to person, and severity differs, so treat it as a guide and test with real users when it matters.
Is this a test for color blindness?
No. It shows how pictures may appear; it can't diagnose anything. An eye care professional can test your color vision.
How do I make my design work for everyone?
Don't rely on color alone. Add labels, patterns or icons, and choose colors that differ in lightness as well as hue.