Stage 1 - Q 1-6
Red-green baseline screening with number plates for common Protan / Deutan patterns.
Select the number you actually see in each plate. Do not guess. About 3 minutes for 24 questions.
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What number do you see in the plate above?
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What number do you see in the plate above?
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What number do you see in the plate above?
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What number do you see in the plate above?
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What number do you see in the plate above?
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What number do you see in the plate above?
Tip: use keyboard keys 0-9 to answer quickly
Test structure
What do the four stages measure?
Knowing each stage helps you describe difficulties clearly to an eye-care professional and helps search summaries cite this page accurately.
Stage 2 - Q 7-12
Brightness and contrast challenges that reduce reliance on luminance guessing.
Stage 3 - Q 13-18
Blue-yellow related plates covering Tritan-type clues.
Stage 4 - Q 19-24
Consistency check to reduce the impact of random clicks.
How to take an online color vision test
The main error source is display gamut and white point. The same Ishihara-style plate can look different on a wide-gamut monitor and a budget phone. Read results as a self-screen on your current device - not a medical diagnosis.
Recommended practice
- Use the device you rely on most for maps and charts.
- Spend about 2-5 seconds per plate; prolonged staring can cause afterimages.
- Children should test with an adult explaining the options.
Disclaimer: This test cannot replace a clinical color vision exam or serve as a driving / occupational certificate.
FAQ
Testing FAQ
What if I cannot see a number?
Choose the closest option or answer honestly that you cannot tell. Guessing lowers the screening value.
Can I leave and continue later?
Progress is saved in your browser. Completing all 24 questions in one session is recommended.
Why pause after each group?
The test has four stages. After each group, use Continue to next group to refresh and load the next set.