Explaining to people what it's like to be color blind has proven to be a thirty some year long exercise in futility. An old school buddy of mine still brings up an episode in first grade. Our evil nun teacher yelled at me until I was in tears because I couldn't identify what color her finely crafted construction paper clothes hanging on her cleverly crafted blackboard straddling yarn clothes line were.
Check this out:
Judging by the sad look my wife gave me when I showed her the site, I'm guessing the examples are accurate.
It turns out ignorance IS bliss.