The dress was black and blue, but the conditions of the photograph caused many to perceive it as white and gold, creating debate. Within a week, more than ten million tweets had Blue Prom Dresses Ellie Wilde Dark Blue, Royal Blue, Light Blue & More! Two Pieces Prom Dresses Tagged "light blue prom dress" Shiny Party 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