Good point about the bleach...Hadn't thought about that. As a former art teacher I would say that red is a primary color, one of the three. I am pretty sure sometime back in the early-mid 80's some Sheriff sprung this question on me....hey wait a minute, I didn't get it right then either! What is the color red evoked me pointing at someone and saying "That is red". Maybe I just wanted a more clear answer, something more concrete.