The dress was black and blue, but the conditions of the photograph caused many to perceive it as white and gold, creating debate. Within a week, more than ten million tweets had ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Here's why people saw the dress differently. 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