Is this dress Blue First brain scan study to feature THAT dress BPS I've never understood the white gold side of the dress illusion but after modifying someone else's picture to make this one I can (kind of) see it. : r opticalillusions 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.