Optical illusion renews blue and black dress debate nine years on Express.co.uk ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive so we know the dress was black and blue BUT that's not what i'm here to discuss : r opticalillusions ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Women's German Dirndl Dress Blue Gold XXL