Blue and Gold Dress: Understanding the Optical Illusion Navy and Yellow Wedding Theme Snow White standing in a blue and yellow dress at the Disney Princesses show at the Resch Center in Green Bay Stock Photo Alamy 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 Luxurious Yellow Blue Roses Women's Mini Dress Yuliya Magdych XS S Yellow Blue Here's why people saw the dress differently.