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 Decision Making Biases in Group: Is the Dress White and Gold or Blue and Black? Applied Social Psychology (ASP) The Pennsylvania State University Here's why people saw the dress differently. 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 I See White and Gold, but the Dress Taught Me How We Shape Our Own Reality by Shaant A Culturated Medium Debate rages over color of dress photographed in rare light Features dailyrecordnews.com