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 I've been thinking about "the dress" for 10 years. Here's what I've learned. Blue Adult Octopus Costume This purple octopus dress is perfect for octopus lovers! What colors do you see? Do you see the dress as black and blue or white and gold? This dress sparked a viral debate back in 2015. , This phenomenon, called color constancy, demonstrates how our ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive