Marten wrote:
I remember growing up having learned that red + blue = purple, yellow + red = orange, and yellow + blue = green. Simple basic rules from kindergarten. And for the crayons I was drawing with at age 5, the rule worked. It wasn't until I was older that I learned that this is the subtractive, CMYK model, that really the colors are cyan (not blue) and magenta (not red) along with yellow... and that in the additive, light-based RGB model, the primary colors are red, blue, and green. Red+Green = Yellow? That was a shocker. But when I was dragging colored wax pencils over paper, I didn't need to know all that.
Actually, its the Red-Blue-Yellow model, not the CMYK model. CMYK is used for (and pretty much only for, infact) printing... Cyan-Megenta-Yellow-Black is not the same system you were taught in kindergarten. The Red-Blue-Yellow was. Red-Blue-Yellow is another colour mixing system, which is commonly used for pigments, for example, paints.
There is, however, the CMYK, and the RGB one, in addition to the red-blue-yellow system. =)
(so, yes, in red-blue-yellow, red+blue = purple, yellow+red = orange, blue+yellow = green.)