Is the dress blue or gold? The phenomenon originated in a photograph of a dress posted on Facebook in 2015. The dress was black and blue, but the conditions of the photograph In 2015, a photograph of a dress went viral, dividing viewers over whether its colors were blue and black or white and gold. This optical illusion highlighted differences in human color perception 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 What Color is The DRESS? Optical Illusion Explained YouTube