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 Gold and white or blue and black?' optical illusion dress from 2015 found at yard sale 9Honey Viral Blue and Black or White and Gold dress marks 10 years ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Exploring the White and Gold Dress Phenomenon I've been thinking about "the dress" for 10 years. Here's what I've learned.