Blue Grape...What?

I feel like I'm the only one posting......That could be because I don't have a life....But anyways! Thank you Anna for giving me my next topic, Gatorade....Good, refuels you when your running low. But the grape flavor...it's blue...not purple...why? Can they not make purple? They have blue and they have red...how can they not make purple? It's a proven fact that Red and Blue mixed together makes purple. And they have both! In nowhere else do you see grape as blue....I mean, why can't they be like other grape flavored drinks? Why is this one so special? Purple is one of my favorite colors...and grape is my favorite flavor of Gatorade...so why can't they figure this out?