For the record, color blindness doesn't have much to do with perception of color. It's a problem with a person's genetics and eyeball biochemistry. It usually effects guys because it's an x-linked trait, and guys have only one x chromosome, so if it's messed up, you're screwed, while girls have two x chromosomes - almost like a backup if one is messed up. What happens normally in an eyeball is that light of different wavelengths (i.e. colors) come in and zaps these photoreceptors called cones. There are three types of cones - those that are primarily effected by red, blue and green light. When light of that color (i.e. wavelength) hits the cone, an electrical signal is generated and goes down a nerve to our brain, which then interprets that as color. When you are color blind you have a messed up ratio of the different red/green/blue cones.

This reminds me of the first time I got stoned and started talking to a group of freshman college students about Hydrogen Bonding in DNA and how cool it is.

Yeah, I am one of those nerdy stoners sometimes.