The Ishihara test is a color perception test for red-green color deficiencies. It consists of a series of colored dot plates, each forming a number or shape. People with normal color vision see a specific number, while those with a deficiency may see a different number or nothing at all. It is the most widely used screening tool for color blindness.

Our tool generates randomized Ishihara‑style plates using carefully selected color combinations. You are shown multiple plates and asked to type the number you see. Based on your answers and known confusion patterns for protan (red) and deutan (green) deficiencies, the tool estimates your color vision status. It is a simulation for educational purposes only.

No online test can replace a professional exam. Screen calibration, ambient light, and display quality all affect results. This test highlights likely red-green deficiencies, but only an optometrist or ophthalmologist can provide a definitive diagnosis using calibrated tools. Use this as a first self-check.

The most common types are protanomaly/protanopia (red‑weak / red‑blind) and deuteranomaly/deuteranopia (green‑weak / green‑blind), both affecting red-green discrimination. Rarer forms include tritanomaly/tritanopia (blue‑yellow) and total color blindness (achromatopsia). This test primarily screens for red-green deficiencies.

Yes, the test is fully responsive. For best results, set your screen brightness to a comfortable medium-high level, avoid blue-light filters, and ensure you are in a well-lit room.

After you answer all plates, the tool counts how many responses differ from the expected normal answer. Fewer errors hint at normal vision, while frequent mismatches with a bias toward protan or deutan patterns point to a possible deficiency. A detailed hint is provided alongside the result.