Optical Illusion

[bluebedouin]

[CarnoustieCats]

Nope - I was fascinated by the moving corona round the black dot

[kengillam]

A natural phenomena called Persistance of Vision, if you stare at a square of colour on a white piece of paper for a while then look at a blank sheet you will see a square of the complementary colour.

[craig7501]

left wall was white, the right wall was burgundy

[RonOne]

A natural phenomena called Persistance of Vision, if you stare at a square of colour on a white piece of paper for a while then look at a blank sheet you will see a square of the complementary colour.

What colours did you see Ken.

[cornishmaid1961]

I saw a beige/cream colour to the left and a dark brown/purple to the right.