An Ishihara-style screening with 14 plates designed to detect red-green and blue-yellow color vision deficiencies.
Identify the number hidden in each dot pattern. About 8% of men and 0.5% of women have some form of color vision deficiency.
This is a screening tool, not a medical diagnosis. Consult an eye care professional for a comprehensive color vision evaluation.
The Color Blind Test is a free online Ishihara-style screening with 14 scientifically designed plates that test for Protanopia, Deuteranopia, and Tritanopia. About 8% of men and 0.5% of women have some form of color vision deficiency. Each plate shows a number hidden in a pattern of colored dots — if you have a color deficiency, certain numbers will be difficult or impossible to see.
You are shown 14 circular plates, each filled with dots of varying sizes and colors. A number is hidden within each plate using color contrasts that are invisible to people with specific types of color blindness. You have 15 seconds per plate to identify the hidden number from four choices. The test includes control plates (visible to everyone), red-green plates (protan and deutan), blue-yellow plates (tritan), and vanishing plates where the correct answer is that no number is visible.
The Ishihara test uses circular plates of colored dots with hidden numbers to detect color vision deficiencies. It was designed by Dr. Shinobu Ishihara in 1917 and is the most widely used color vision screening method in the world.
This test screens for Protanopia (red-weak), Deuteranopia (green-weak), and Tritanopia (blue-yellow). Red-green color blindness is the most common, affecting about 8% of men. Tritanopia is much rarer, affecting less than 0.01% of people.
This is a screening tool, not a medical diagnosis. Results can be affected by screen calibration, brightness settings, and viewing conditions. For a definitive result, consult an eye care professional for a clinical Ishihara or anomaloscope test.
If you enjoyed this, try these: Color Perception Test · Color Match Challenge · Peripheral Vision · Match the Color
Last updated: March 2026 · whatifs.fun — Free interactive games, experiments & simulations