What is a color blindness test?
A color blindness test checks whether certain color combinations are difficult to distinguish. Clinical tests use validated plates and controlled viewing conditions.
Free Color Blindness Test
A color blindness test is a visual screen that checks whether certain colors are hard to distinguish. This free browser tool uses original dot plates to screen red-green color discrimination without storing your answers.
Six original dot plates
Set up your screen before you begin
- 1
Use a color display
Turn off grayscale, night mode, and color filters.
- 2
Choose neutral light
Avoid glare and keep screen brightness near the middle.
- 3
Sit at arm's length
View each plate straight on and answer without squinting.
Screening only: this browser tool is not a medical test and cannot diagnose a color-vision deficiency. Screen calibration, brightness, ambient light, and display quality can change what you see.
Answers stay in this browser tab.
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Color blindness test FAQ
Can an online color blindness test diagnose me?
No. An online screen can only flag a possible pattern. An optometrist or ophthalmologist must use validated materials to diagnose a color-vision deficiency.
Why can screen settings change my result?
Brightness, color filters, night mode, calibration, glare, viewing angle, and display quality all change how dot colors appear.
What does this test check?
This short activity mainly screens red-green color discrimination and includes a high-contrast control plate to catch unreliable viewing conditions.
Are my answers stored?
No. Plate generation, answers, and scoring stay in your browser tab and are not uploaded by this tool.