ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive First brain scan study to feature THAT dress BPS 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 So I searched up the black and blue dress : r opticalillusions Is That Dress White and Gold or Blue and Black? The New York Times Here's why people saw the dress differently.