Is This Dress Blue And Black Or White And Gold? Here's What The Experts Say How "The Dress" Became an Illusion Unlike Any Other Scientific American Eleven years ago, a single photo posted on Tumblr sparked one of the biggest internet debates of all time. The dress instantly divided the world, some swore it was white and gold, How does a black and blue dress sometimes appear white and gold? The Brains Blog Debate rages over color of dress