The dress was a viral online phenomenon in 2015, centered on a photograph of a dress that people disagreed on whether it was blue and black or white and gold. Within a ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Is The Dress blue and black or white and gold? The answer lies in vision psychology Psychology The Guardian This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see Science explains how time spent outdoors colors your view of #thedress Los Angeles Times