Mermaid Black Sequin Long Sleeve Prom Formal Dress Promfy Sherri Hill 57448 Dress Sherri Hill Dresses Formal Approach 6 Periwinkle The Dress Optical Illusion: Blue and Black or White and Gold Simple A line Satin Black Long Prom Dresses, Satin Evening Graduation Dresses US 6 Custom Color Isaac Mizrahi New York Mixed Print Sequin Shift Dress Nordstrom What color is the dress? Why do some people see blue and black and some people see gold and white when looking at a single image of a dress? : r askscience