More couples choosing nonclergy officiants for nuptials Chicago Tribune The dress was a 2015 online viral phenomenon where viewers disagreed on a photographed dress's colour. The phenomenon revealed differences in human colour perception and became the subject of scientific investigations into ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive ELI5: The science behind the blue black, white gold dress phenomenon? : r explainlikeimfive