Is this color blind test accurate?

It is a screening tool, not a clinical diagnosis. Results depend on your screen's brightness and color calibration. A clinician uses calibrated plates and instruments; use this to decide whether to get checked.

How long does the test take?

The quick test is 14 plates and takes about 90 seconds. Go with your first impression on each plate.

What types of color blindness does it screen for?

Red-green deficiency (deuteranomaly and protanomaly), which is by far the most common, plus blue-yellow (tritan) weakness, which is rare.

Color Blind Test

A free, 90-second screening for color vision deficiency. Read the number hidden in each plate of dots — we'll estimate your type and severity, with a shareable result.

14 plates · no sign-up · works on your phone. Not a medical diagnosis.

You'll see 14 plates of colored dots. For each one, tap the number you see — or "I can't see a number." Go with your first impression; each plate has a short timer.

Some plates show no number to most people — “I can't see a number” is a normal, expected answer, not a failure.

Best on a phone or laptop at full screen brightness. Keyboard: press a number key, or Enter if you can't see one.

What this test measures

These plates are pseudoisochromatic — a figure is hidden in a field of colored dots so that only the color, not the brightness or the edges, separates it from the background. If your eyes struggle to tell certain colors apart, the number disappears into the noise. Each of our plates targets a specific confusion axis:

Green-weak (deutan) and red-weak (protan) plates screen for red-green deficiency, the most common form.
Blue-yellow (tritan) plates screen for a rarer weakness along the blue-yellow axis.
Control plates are high-contrast and readable by everyone — they confirm your screen and attention are up to the task.

How to get a reliable result

Set your screen to full brightness and avoid glare or direct sun.
Use a phone or laptop, not a projector; don't wear tinted lenses.
Answer with your first impression — don't hunt for the number.

The plates here are generated by code, not scanned from any book, so every visit is a fresh set. That keeps them free to use and impossible to memorize — but it also means this is a screening aid, not a substitute for an eye exam.

Frequently asked

Is a color vision test the same as an eye test?

No. A standard eye test checks how sharply you see. A color vision test checks how well you distinguish colors — you can have perfect sharpness and still have a color deficiency.

Can color blindness be cured?

Inherited color vision deficiency is lifelong and isn't currently curable, though special filters can help some people tell certain colors apart. An optometrist can explain the options for your specific type.