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 Decision Making Biases in Group: Is the Dress White and Gold or Blue and Black? Applied Social Psychology (ASP) The Pennsylvania State University ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive The Dress": Why People See White and Gold or Blue and Black