The dress was a viral online phenomenon in 2015, centered on a photograph of a dress that people disagreed on whether it was blue and black or white and gold. Within a This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see Old People Saw White And Gold, And More Insights From A 23andMe Study Of #TheDress Fast Company The Science of Why No One Agrees on the Color of This Dress WIRED 3,591 Blue Dress With White Polka Dots Stock Photos, High Res Pictures, and Images Getty Images