Understanding the Blue and Black Dress Illusion In February 2015, a photo of a striped dress posted online unexpectedly turned into a worldwide argument. Some viewers swore it was blue and black, while others were convinced it was white Optical White Black Dress Illusion Color Illusion Optical Illusion Mustard And Blue Dress Optical Yellow Blue The White and Gold (No, Blue and Black!) Dress That Melted the Internet The New York Times Look closely the highlighted sections of these dresses are the same colour