A free Ishihara-style color blind test. What number can you read?
Ready when you are
This is a free online color blind test in the style of the classic Ishihara plates used to screen for colour vision deficiency. Each plate is a disc of coloured dots, and somewhere in the dots a single digit is hidden — drawn in a different hue from the dots around it. Your job is simply to read the number.
The dots deliberately vary in lightness, so you cannot find the digit by looking for lighter or darker spots. The only thing that separates the figure from the background is hue, which is exactly what makes these plates a test of colour perception rather than brightness perception.
The first plate uses a wide hue gap between the figure and the background, so the number jumps out. Each plate after that narrows the gap. By the final plate the two hues are close neighbours on the colour wheel, and reading the digit takes a genuinely sharp eye for colour.
This is a fun, game-style version of a colour plate test, not a medical assessment. A real diagnosis of colour vision deficiency uses calibrated, standardised plates under controlled lighting and should come from an eye-care professional. If you consistently cannot read the easy plates, that is interesting — but treat it as a prompt to get a proper test, not as a result.
