Color Blind Test
A free 12-plate Ishihara-style screening for red–green color vision deficiency. Everything runs in your browser — no signup, no upload, no tracking.
Plate 1 of 12
Score: 0
What number do you see in the plate above? Tap Nothing if it's blank.
0 / 12
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Correct
0
Red–green plates missed
0
Control plates missed
0
This is a screening tool, not a medical diagnosis. Screen brightness, calibration, ambient light, and lens color all affect the result. See an eye-care professional for a formal assessment.
About this test
The Ishihara test — designed by Dr Shinobu Ishihara in 1917 — uses plates of coloured dots that form a number visible to people with typical color vision. People with red–green color vision deficiency see a different number, or nothing at all.
What it screens for
- Protanopia / protanomaly — reduced or missing sensitivity to red light.
- Deuteranopia / deuteranomaly — reduced or missing sensitivity to green light.
- Together these account for the vast majority of color vision deficiencies (~8% of men, ~0.5% of women).
What it doesn't screen for
- Tritanopia (blue–yellow deficiency) — very rare, and Ishihara plates are not designed to detect it.
- Achromatopsia (total color blindness) — requires clinical testing.
- Subtle acuity or contrast issues unrelated to color.
For the most reliable read
- Use a well-calibrated screen at full brightness.
- View in a normally-lit room — not direct sunlight or a fully dark room.
- Don't wear tinted glasses.
- Answer with your first instinct; don't strain.