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 I've been thinking about "the dress" for 10 years. Here's what I've learned. Why nobody could agree on the color of that dress on X I've never understood the white gold side of the dress illusion but after modifying someone else's picture to make this one I can (kind of) see it. : r opticalillusions The science behind the controversial blue black, gold white dress