Is The Dress blue and black or white and gold? The answer lies in vision psychology Psychology The Guardian MmE5MTRjYWQ4MDNi.mp4 The Dress is now a Halloween costume The Dress divided the Internet, but it's really about subtraction Science News This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see Optical illusion renews blue and black dress debate nine years on Express.co.uk