In February 2015, a photo of a striped dress posted online unexpectedly turned into a worldwide argument. Some viewers swore it was blue and black, while others were convinced it was white 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 Classical Floor Length Long Sleeves Empire Waist Chiffon Evening Dress The Infamous Dress Optical Illusion: Gold and White or Black and Blue