ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Is That Dress White and Gold or Blue and Black? The New York Times Gold Lace Sheer Sleeve Royal Blue Velvet Mermaid Dress Lunss Is it blue and black or white and gold? A #viral optical illusion has been used to test a new #algorithm that delves into differences in colour perception https: t.co Pc9zLOTVxh #thedress #opticalillusion #optical # Black and blue Activating TOK