Color blindness test
A one-minute red-green color vision check with dot plates. The numbers are new every time, so you can repeat it honestly.
Sit at a normal distance, set the screen to full brightness and turn off night mode or blue-light filters. Answer quickly — about 3 seconds per plate.
How the test works
- The first plate is easy for everyone and checks that your screen shows the colors properly.
- The other six hide a number in colors that look the same to people with red-weak (protan) or green-weak (deutan) vision — the two types behind almost all color blindness. With typical color vision the number stands out clearly.
- Each dot gets a random brightness, so the number can't be found by brightness alone.
About color blindness
About 1 in 12 men and 1 in 200 women have a red-green color vision deficiency, usually from birth. Most people with it see many colors, but confuse reds, greens, browns and oranges. It doesn't get worse over time when inherited; a sudden change in color vision is a reason to see a doctor soon.
Frequently asked questions
Is this test a diagnosis?
No. Screens differ in color, so this is a screening. For a definite result, an eye doctor or optician uses printed Ishihara plates or an anomaloscope.
Does it test blue-yellow color blindness?
No — blue-yellow (tritan) deficiency is very rare and can't be screened reliably on ordinary screens, so this test focuses on red-green.