Color Blindness Test: Are You Color Blind?
Read the number hidden in 12 colored dot plates: the tool tells you whether your color vision looks normal or suggests red-green or blue-yellow color blindness. A rough screening only, and nothing is uploaded.
- 12 plates
- Red-green and blue-yellow
- Photo simulator
- Nothing is uploaded
100% private — Everything is processed directly in your browser: your files, voice, and image are never sent to Chatzam's servers.
How to take the color blindness test
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Read each plate
Type the number you see in the colored dots, or choose "I don't see anything" if no number appears.
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Go all the way through
The 12 plates follow one another: a control plate everyone can read, red-green plates and blue-yellow plates. Answer without overthinking.
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Read your result
Normal color vision, possible red-green color blindness (protan or deutan tendency) or possible tritan, with a plate-by-plate breakdown of your answers.
A simple screening, and a simulator to understand it
Plates generated by the tool
Colored dot plates inspired by the Ishihara test but created by the tool: they are not the official plates.
Red-green and blue-yellow
Some plates target protan and deutan confusions, others tritan confusions, plus a control plate to check your display.
Plate-by-plate results
For each plate you see the expected number and your answer, so you can spot where the confusions happen.
Color blindness simulator
Upload a photo and see it as someone with protanopia, deuteranopia, tritanopia or achromatopsia would. The image stays on your device.
Am I color blind? How to read your result
Everyone should be able to read the control plate: if you can't, the problem is most likely your screen or the lighting, and the rest of the test isn't reliable. If you read all the other plates, your color vision looks normal. If you miss several red-green plates, the tool suggests possible red-green color blindness, with a protan or deutan tendency; if it's the blue-yellow plates, possible tritan. A single mistake doesn't mean much: tiredness, glare or hesitation is enough. This test is a rough on-screen screening, not a diagnosis: only an eye care professional such as an optometrist or ophthalmologist can confirm it, with calibrated printed tests and other exams.
Protanopia, deuteranopia, tritanopia: the types of color blindness
The retina has three types of cones, sensitive mainly to red, green and blue light. When one of them is missing or doesn't work properly, some colors get mixed up. Protanopia affects the red cones: reds look darker and get confused with greens or browns. Deuteranopia affects the green cones, with similar confusions; deutan types are the most common. In the milder forms (protanomaly, deuteranomaly), colors are seen but harder to tell apart. Tritanopia, which is much rarer, confuses blue with green and yellow with violet. Red-green color blindness is inherited and linked to the X chromosome: it affects about 8% of men and 0.5% of women of Northern European descent. Achromatopsia, seeing no color at all, is extremely rare.
Taking the test on a screen, and when to see a professional
A screen doesn't show colors the way a printed booklet does: brightness, night mode, blue light filters, color profiles or a low-quality panel can all skew the result. Turn off night mode, turn up the brightness, avoid glare and keep your usual glasses on, but no tinted lenses. If the result suggests color blindness, or if you notice a recent change in how you see colors, see an optometrist or ophthalmologist: an acquired color vision problem, caused for example by an eye disease or a medication, needs to be checked. Keep it in mind too before aiming for a job that requires tested color vision, such as pilot or train driver: only the official exam counts.
Frequently Asked Questions
How do I know if I'm color blind?
A colored plate test like this one is a good first screening: if you can't read several numbers that other people see, you may be color blind. The diagnosis is made by an optometrist or ophthalmologist.
Is this online color blind test accurate?
It's a rough screening: your screen settings, brightness and display quality all affect the result. It doesn't replace an eye exam with an optometrist or ophthalmologist.
Can women be color blind?
Yes, but it's rarer: about 0.5% of women of Northern European descent have red-green color blindness, compared with about 8% of men. The gene involved is carried on the X chromosome, and a woman usually needs both of her X chromosomes to be affected.
What do color blind people see?
It depends on the type: someone with protanopia or deuteranopia mostly confuses red, green, orange and brown; someone with tritanopia confuses blue and green instead. Upload a photo to the simulator to see it the way they do.
Can color blindness be cured?
Inherited color blindness can't be cured, but it stays the same throughout life. Color-filtering glasses can boost some contrasts for some people, without giving normal color vision.