In 2015, a photograph of a dress went viral, dividing viewers over whether its colors were blue and black or white and gold. This optical illusion highlighted differences in human color perception 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 Piaget 'Opal' White Gold Dress Watch Analog:Shift color theory How can the "dress" optical illusion be accurately reproduced on other images? Graphic Design Stack Exchange