10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether the dress Optical illusion renews blue and black dress debate nine years on Express.co.uk What colour is the dress? Why some people see white and gold and others see blue and black National Post How I Flipped My Brain's View of the Black and Blue Dress Jeff Greenhouse What color do you see? Debate rages over color of dress photographed in rare light Carson City's Trusted News Source Since 1865 Is That Dress White and Gold or Blue and Black? The New York Times