Donaldson R F Odd Colour Out
Every square is the same colour except one. Find the odd one out — the difference gets smaller as you go.
1
Level
3
Lives
0
Best
Find the square that looks slightly different.
This is a perception game for fun, not a medical colour-vision test. If you'd like to check how a page looks under different types of colour blindness, try the Colour Blindness Simulator.