The dress is blue. Here's why Remember when the internet went absolutely nuts on the colour of a dress? The dress was blue and black. The original viral poster, Caitlin McNeill, later said it was a black and blue dress Amazon.com: MEROKEETY Women's Knit Bodycon Sweater Dress Button Short Sleeve Crew Neck Elegant Formal Mini Dress, Black, Small : Clothing, Shoes & Jewelry Picture Of Viral Blue And Black Dress Also Shows White And Gold, And Twitter Is Arguing Over It Again Evie Magazine The Mode Sheer Knit Off The Shoulder Maxi Dress in Black Lisa Maree