How the test works
- A grid of coloured tiles appears. All are the same colour except one.
- Click the tile with the different shade.
- Each find makes the next grid bigger and the difference smaller.
- You have 60 seconds; a wrong tile costs 3 seconds. Your score is how many you find.
What it measures
Odd one out tests how finely you notice small differences in colour and how quickly you can scan a grid. Later levels need careful attention; it's also a fun, rough check of colour vision, though not a medical test.
What is a good score?
| Score | Better than about |
|---|---|
| 32 found | 99% of people (top 1%) |
| 26 found | 90% of people (top 10%) |
| 22 found | 75% of people |
| 18 found | 50% of people (average) |
| 14 found | 25% of people |
Estimated from typical scores for this kind of test.
Tips to improve
- Look at the whole grid at once rather than tile by tile; the odd one often pops out.
- Glance at the edges and corners too; it's easy to miss tiles there.
- Don't guess: a wrong tile costs 3 seconds, which is usually longer than looking again.
- Turn your screen brightness up and avoid glare.
Frequently asked questions
What is a good odd one out score?
Around 18 in 60 seconds is typical. 25 or more puts you in roughly the top 12%, and 30 or more is in the top 2-3%.
Is this a colour blindness test?
No. It only changes how light or dark a colour is, and screens vary a lot. If you're worried about your colour vision, see an optometrist.