10 years since THE DRESS blew up Internet. Two thirds of people saw white and gold. Its an optical illusion caused by weird lighting and an overexposed background. It Is actuallylly blue and black. Optical illusion renews blue and black dress debate nine years on Express.co.uk 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 The White and Gold (No, Blue and Black!) Dress That Melted the Internet The New York Times The world's most famous optical illusion turns 10 years old Creative Bloq The Blue and Gold Dress Auroratide