Color Blind Test
Look at each plate of colored dots and type the number you see. If you cannot see a number, press “I see no number”. Eight plates, about two minutes.
For a fair result: use a normal color setting (turn off night mode and blue-light filters), set the screen brightness to medium or high, and wear your usual glasses or contact lenses.
Your result
This is a screening for fun and information, not a medical diagnosis. Plates are generated in your browser and screens differ in color and brightness, so results can vary. Only an eye-care professional can diagnose color vision deficiency.
About this color blind test
Color blindness (color vision deficiency) affects about 1 in 12 men and 1 in 200 women, most often as red-green deficiency. In this Ishihara-style test every number is drawn with dots of two color groups, an orange-red group for the number and a green group for the background, with random brightness so only the color tells them apart. People with normal color vision see the number easily; people with red-green deficiency find the number hard to see or cannot see it.
Questions
Is this color blind test accurate?
It is a quick screening for red-green deficiency, not a diagnosis. Results depend on your screen, its color settings and the room light. If you miss plates, repeat the test on another screen and see an eye-care professional for a clinical test such as the Ishihara book or an anomaloscope.
What is an Ishihara test?
The Ishihara test is the classic color vision test: plates of colored dots with a number made of dots in a slightly different color. People with normal color vision read the number; people with red-green deficiency read it wrongly or not at all. This page uses the same idea with plates generated in your browser.
What types of color blindness are there?
The most common are red-green types (deuteranomaly and protanomaly, and the rarer deuteranopia and protanopia). Blue-yellow types (tritan) and complete color blindness are rare. This screening checks red-green only.
I cannot see any numbers. Am I color blind?
Not necessarily. Night mode, a blue-light filter, very low brightness or a screen with poor colors can hide the numbers. Check your settings and try again. If you still miss most plates, see an eye-care professional.
Are my answers stored?
No. The test runs in your browser and nothing is stored or uploaded.