Color Blindness Test
Four quick plates drawn right in your browser — read each number and the check flags whether a professional color-vision exam is worth booking.
How to use
- Turn off night mode / color filters and set full brightness.
- Press Start, then type the number you see in each plate.
- After 4 plates you get an informal verdict and a suggestion.
Frequently asked questions
What does this test check for?
It is an informal screen in the spirit of Ishihara plates: each round shows a number drawn with warm red-pink dots inside a field of orange-green dots. If your red-green color perception is reduced, the number gets harder or impossible to separate from the background.
Is this a medical diagnosis?
Absolutely not. Screen quality depends on your screen’s colors and brightness, and this 4-plate check is far shorter than a clinical test. A wrong answer here means “consider a proper eye exam”, nothing more.
What are the common types of color blindness?
Red-green defects dominate: deuteranomaly (reduced green sensitivity, most common) and protanomaly (reduced red), with full deuteranopia/protanopia being rarer. Blue-yellow (tritan) defects and total color blindness are much rarer.
Why are mostly men affected?
The genes for red and green photopigments sit on the X chromosome. Men have one X, so a single recessive allele shows; women have two, and one normal copy usually compensates. Roughly 1 in 12 men versus 1 in 200 women has some red-green defect.
How should I set up the test?
Full brightness, no night mode or blue-light filter, and a screen viewed straight on. Filters that shift colors invalidate the check entirely — turn them off before starting.