Color Blind Test
Check red-green color vision with Ishihara-style plates generated in your browser — a screening demo, not a diagnosis.
How to use this test
Look at each of the six dot-pattern plates and tap the number you see, or tap 'I can't see a number'. Use normal screen brightness and daylight if you can, then read the per-plate review.
How the measurement works
The tool generates Ishihara-style plates in your browser: vanishing plates use red-green confusion colours, control plates use blue and yellow with strong luminance contrast. It counts how many digits you can read.
How to interpret results
Reading all six plates shows no sign of red-green deficiency in this screening. Missing vanishing plates while reading the control plates is consistent with red-green colour deficiency. Missing a control plate means the test conditions were unreliable.
Troubleshooting tips
If a control plate is unreadable, raise screen brightness, turn off night mode or blue-light filters, move to daylight and retake the test. For a real answer, book a professional colour-vision test.
Related tests
You can also browse every utility from the complete tool index.
Related guides
- Color Blind Test Online: What It Can and Cannot Tell You — How online color vision screening works, what vanishing and control plates mean, and when a missed plate needs a professional test.
Common color vision questions
How do I test if I am color blind online?
Take a screening with Ishihara-style plates: look at each dot-pattern plate and tap the number you see. This site generates six plates in the browser — four vanishing plates and two control plates — and shows a per-plate review. It is a screening demo, not a diagnosis.
Read full answer →What does it mean if I cannot see numbers on Ishihara plates?
Missing vanishing plates while reading the control plates is consistent with red-green colour deficiency. Missing a control plate usually means poor test conditions — low brightness, night mode, or dim lighting — so retake the test in daylight before drawing any conclusion, and book a professional colour-vision test to confirm.
Read full answer →Can a phone screen affect a color blind test?
Yes. Screen brightness, night mode or blue-light filters, the display's colour profile and room lighting all change how the plates look. Use normal brightness, switch off night mode, and sit in daylight for the most reliable screening result.
Read full answer →Can an online color blind test diagnose color blindness?
No. It is a screening demo only. A real diagnosis needs calibrated printed Ishihara plates under controlled light plus an eye exam. A missed plate here is a reason to book a professional test, not a diagnosis.
Read full answer →