Blue, for me.
And no, blue is not a color in this case. Blue is an actual flavor when it comes to snow cones, slushees, ice pops, etc. 
As for snow cone memories, snow cones and related snow treats always remind me of my town's little league baseball park. The field had great facilities. I would often work the concession stand or the scoreboard there when I wasn't playing. That field and snow cones just seemed to mesh together. They had these ice cream hot dogs there, too. The bun is cake, the ketchup is chocolate syrup, and the hot dog is, of course, ice cream. Ahh, summer...