10 years ago today, this dress was posted online, turning into a viral phenomenon. Viewers couldn't decide if the dress was blue and black, or white and gold. It was later confirmed Optical illusion: Dress colour debate goes global BBC News Woman discovers optical illusion dress at yard sale, goes viral on TikTok Trending News Hanfu Dress for Women Blue Gold Tang Style CASSIE MINI DRESS 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