Pia Wurtzbach returns to Cannes red carpet in dress inspired by 'Moulin Rouge' ABS CBN Lifestyle so we know the dress was black and blue BUT that's not what i'm here to discuss : r opticalillusions The world's most famous optical illusion turns 10 years old Creative Bloq ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Champagne and Gold Dimitra Designs The dress and individual differences in the perception of surface properties ScienceDirect