Color Blind Test
A quick, free color blindness test with twelve dot plates drawn fresh by our code every time. Spot the number hidden in each circle of colored dots and see how you do on red-green and blue-yellow plates. It is a screening game, not a medical diagnosis.
How to play Color Blind Test
- Turn your screen brightness up, switch off night mode or blue-light filters, and sit about an arm’s length from the screen.
- Each plate is a circle of colored dots. Some of the dots form a one- or two-digit number in a different color.
- Pick the number you see from the four choices, or choose No number if nothing stands out. Go with your first impression; about three seconds per plate is plenty.
- The first plate is a control that nearly everyone can read. The others test the red-green and blue-yellow color pairs, and get softer as the test goes on.
- At the end you see how many plates of each type you read correctly, plus a plain-language summary. You can review every plate and your answer.
Controls
- Tap / click an answer
- Keys 1–4 pick a number, 0 or N picks “No number”
- Leave mid-test and your answers so far are kept on this device
Tips
- Don’t stare too long: the hidden numbers are easiest to see at a glance.
- If you miss the first (control) plate, your screen is probably too dim or tinted. Fix that and retake the test.
- Try again on another screen. Phones, laptops and monitors show colors quite differently.
FAQ
How does this color blind test work?
Each plate hides a number made of dots in one color family on a background of dots in another, chosen from color pairs that people with a color vision difference tend to confuse. The dots vary in brightness, so you have to rely on color to find the number.
Can an online test diagnose color blindness?
No. This is a screening game. Screens vary in color and brightness, so the result is only a hint. If you are worried, an optometrist or eye doctor can test you with calibrated plates and other tools.
What is the most common type of color blindness?
Red-green color vision differences are by far the most common, affecting roughly 1 in 12 men and about 1 in 200 women. Blue-yellow differences are much rarer.
Are these the same plates an eye doctor uses?
No. Our plates are drawn by our own code each time you play, with new numbers and dot layouts. They follow the same idea of hidden numbers in colored dots, but they are not copies of any clinical test.
Why did I miss plates even though my color vision is fine?
Low brightness, warm night-time screen filters, glare and very small screens all make the later, softer plates harder. Retake the test in good light on a bright screen.