ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive 10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether the dress 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 Ten years ago, a photo of a dress posted on Tumblr sparked a massive debate: was it blue and black or white and gold? Millions argued online, and even celebrities joined in. Scientists later explained