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 Sassy Shortcake Lush and Lemons Dress Electric Blue This dress went viral for its confusing colours. Here is the story behind it What colour do you see the dress as? Good Vibes Deep V Neckline Ruched Mini Dress Blue XXL The Dress: Blue & Black? White & Gold? Cease & Desist? CNN