Does this test diagnose color blindness?

No, it is a screening aid that can indicate a possible red-green color vision difference; a formal diagnosis requires an eye-care professional.

Which type of color vision difference does it detect?

The plates target the most common red-green deficiencies, including protan and deutan variations.

Can screen settings affect the result?

Yes, altered color profiles, night mode, or low brightness can change how the plates appear and influence the outcome.

Is the test suitable for children?

Children who can recognize numbers or shapes can use it, but any concerns should be followed up with a pediatric eye exam.

Screening · Educational only · Not a medical diagnosis

Color Blindness Test

Look at each color dot pattern and identify the number you see. This is an Ishihara-style screening tool for educational purposes only. Screen color and lighting can affect results. For a definitive diagnosis, consult an eye care professional.

About this screening

These plates are generated procedurally to illustrate the red–green confusion effect. Color-blind individuals may have difficulty distinguishing certain color pairs because those colors fall closer together along a red–green confusion line. A demonstration plate is shown first so you can confirm the task.

This test is not a substitute for professional color vision testing. Lighting, screen settings, and other factors can influence your results.

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About

This screening tool presents a series of Ishihara-style plates containing patterns of colored dots that form numbers or shapes visible to people with typical red-green color vision. Each plate is designed to reveal whether the user can distinguish specific hues along the red-green axis, which is the most common type of inherited color vision difference. The test runs entirely in the browser and requires only a few minutes to complete.

How your result is scored

The result shows how many plates you identified correctly out of the total presented, giving a simple count of successful recognitions. A lower count may suggest difficulty discriminating certain red-green shades, while a higher count aligns with typical color vision; however, this is a screening aid only and not a medical diagnosis.

Tips to improve

Take the test in a well-lit room with a neutral white background.
Set your monitor to its native resolution and disable night-shift or blue-light filters.
View each plate at a comfortable distance without squinting.
If you wear prescription lenses, keep them on for the screening.

Frequently asked questions

Does this test diagnose color blindness?: No, it is a screening aid that can indicate a possible red-green color vision difference; a formal diagnosis requires an eye-care professional.
Which type of color vision difference does it detect?: The plates target the most common red-green deficiencies, including protan and deutan variations.
Can screen settings affect the result?: Yes, altered color profiles, night mode, or low brightness can change how the plates appear and influence the outcome.
Is the test suitable for children?: Children who can recognize numbers or shapes can use it, but any concerns should be followed up with a pediatric eye exam.