Games
Color Vision Test — Find the Odd Colour Online Free
🔒 Runs in your browser
Can you spot the odd colour? 10 rounds — each round the difference between colours gets smaller. Tests colour discrimination.
How to use this tool
- Look at the displayed circle pattern.
- Enter the number or shape you see.
- Work through all plates to see your results.
Find the circle that has a slightly different colour from all the others. 10 rounds — the difference gets smaller each round, making it harder.
How it works
Each round shows a 5×5 grid of circles, all the same hue except one. The hue difference starts large and decreases each round. This tests colour discrimination ability — the ability to distinguish subtly different hues. Percentile rankings are based on population averages for hue discrimination tasks.
Frequently Asked Questions
- Does this test diagnose colour blindness?
- No. This is a fun online test, not a medical diagnostic tool. If you have concerns about colour vision, consult an optometrist for a proper Ishihara plate test.
- What types of colour blindness are there?
- The most common is red-green colour blindness (deuteranopia and protanopia), affecting about 8% of males. Blue-yellow blindness (tritanopia) is rarer.
- Is my data sent anywhere?
- No. Everything runs in your browser.