Optical illusion renews blue and black dress debate nine years on Express.co.uk The Dress Debate SETTLED: Black And Blue Or White And Gold? TODAY ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive The actual dress was black and blue. The confusion came from how lighting and color perception tricked people's brains, making some see it as white and gold. It became a viral example