I was at the eye doctor with my husband when we found out he was color blind. Blue/Green/Yellow. I started laughing when he read the number on the card and I read a different number. I couldn't believe he didn't see the same number that I saw. He had lived more than twenty years not knowing. I have a friend who is color blind. She is an embroiderer and has to have someone pull her threads for her. I also grew up knowing a man who was completely colored blind. His wife had to pick out his clothes every morning. Boy did he ever hate to make her mad.