Color Blind Test
Check red-green & blue-yellow vision
You'll see 11 dotted plates. Type the number hidden in each one, or press I can't see one. It takes about two minutes.
- Turn your screen brightness up and switch off night mode, blue-light filters and "true tone".
- Sit about an arm's length away and give each plate no more than a few seconds.
- Wear your glasses or contacts if you normally do (but not colour-correcting glasses).
| Plates | Correct |
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See every plate and your answer
This is a screening test, not a diagnosis. Screens show colours differently, so an eye doctor or optometrist should confirm any result with printed plates or an anomaloscope.
About the Color Blind Test
This test works like the dotted plates an eye doctor uses. Each plate hides a number in dots of colours that people with a colour vision deficiency find hard or impossible to tell apart. Plates are generated fresh each time from the colours each type of colour blindness confuses, from bold ones to faint ones that catch milder deficiencies, and the result tells you which type your answers point to.
- Turn the brightness up and switch off night mode or blue-light filters.
- Press Start and type the number you see in each plate, or press I can't see one.
- Read your result and review every plate with the right answers.
Frequently asked
How accurate is an online colour blind test?
It's a good screening test, but screens vary in colour and brightness, so it can't diagnose. An optometrist can confirm a result with printed Ishihara plates or an anomaloscope.
What types of colour blindness are there?
Protan (red-weak or red-blind) and deutan (green-weak or green-blind) are the common red-green types. Tritan (blue-yellow) is rare. Most people with colour vision deficiency still see many colours; they mix up certain shades.
How common is colour blindness?
About 1 in 12 men and 1 in 200 women have a red-green colour vision deficiency, mostly inherited. It's usually present from birth and doesn't change.
Are these the real Ishihara plates?
No. They're generated plates built on the same idea, using the exact colour confusion lines for each type, so they're different every time you take the test.
Is what I type sent to a server?
No. The tool runs entirely in your browser and there's no server behind it, so what you type never leaves your device and nothing is stored. You can check: it keeps working if you go offline after the page has loaded.
More from the Calculators drawer
Other tools kept in this drawer, plus a few favourites from the bench.