So I searched up the black and blue dress : r opticalillusions Black Velvet Embroidered Lace Trim Romper Nasty Gal USA Hillary Romper Black Floral, XXL, Petal & Pup Gym and Tonic Butter Romper Dress in Black Dress 2 Impress NH White and gold or blue and black what colour is the dress? An eyewitness gives a definitive answer The Independent The Independent The Science Behind the Dress The New York Times