Many people do not know they see colours differently until they try a dot test. This check shows eight plates of coloured dots, each hiding a number drawn only by a change in colour, not brightness. Type what you see (or press “I see no number”) and get a summary at the end, including whether you missed the red-green or blue-yellow plates. The plates are made fresh each time, so the numbers cannot be memorised.
loading toolHow to take the colour vision test
- Turn screen brightness up and switch off night mode or blue-light filters.
- Look at each plate for about 3 seconds and type the number you see.
- Press “I see no number” if you cannot make one out.
- Read your summary after plate 8, and see which plates you missed.
Good to know
- Do the test in daylight or white room light, 50–75 cm from the screen.
- Colour vision differences are usually inherited and do not get worse; a sudden change in colour vision should be checked by a doctor promptly.
Questions
Is this an Ishihara test?
No. The Ishihara plates are a printed medical test. These plates are our own, made on your screen with a similar idea. This is a free screening aid, not a medical test. Screens, speakers, lighting and distance all affect the result, so it cannot diagnose anything. If you notice a change in your eyesight or hearing, see a qualified optometrist, audiologist or doctor.
How common is colour blindness?
About 1 in 12 men and 1 in 200 women have some red-green colour vision deficiency. Blue-yellow differences are much rarer.
Why did I miss a plate everyone should see?
Usually the screen: low brightness, night mode, blue-light filters or a tinted screen protector change colours. Fix those and try again in good light.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
