An optical illusion has divided the internet, as people can't agree on the colour they are seeing. The black and blue dress (or was it white and golden?) once stumped netizens, and the latest illusion ...

A head-scratching optical illusion challenges the perception of color and how the brain plays tricks on us. In an image created by the UK contact lens vendor Lenstore, a series of lilac letters ...

Forget the black and blue dress – this photo of an unassuming building is the latest image to demonstrate just how sophisticated our brains are at viewing the colours we see around us. The strange ...