Optical illusion: Dress color debate goes global조이누리 기자단 이세빈 On Thursday, February 26th, 21-year-old Scottish singer Caitlin McNeil posed a simple question along with a photo of a dress on the social media website, Tumblr. It said, “Guys, please help me - is this dress white and gold, or blue and black?”How about you guys? At first when I see this pic, I said it seems to be Blue black. And I've ..