Here's why people saw the dress differently. I've been thinking about "the dress" for 10 years. Here's what I've learned. 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 Exploring The Color Controversy of The Dress 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