Do these dots look blue or purple? Mind-bending optical illusion reveals how your perception of colour can be easily skewed


A new optical illusion has revealed just how easily our perception of colour can be skewed.

The illusion, by Harvard University, involves a grid of 1,000 individual dots, which range from very blue to darker hues of purple.

Researchers asked a group of volunteers to say if they thought each individual dot was either blue or purple.

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