Is the dress blue or gold? The phenomenon originated in a photograph of a dress posted on Facebook in 2015. The dress was black and blue, but the conditions of the photograph Blue or Gold? #THEDRESS. The Dress by Vicky Chen Clear as Mud Medium The world's most famous optical illusion turns 10 years old Creative Bloq 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