I thought that they were going to run out of naming schemes for each generation, because there are a limited number of basic colors to choose from. However, only recently did I realize that this would never happen, because they're not limiting themselves to colors and materials. They can name their stuff after just about anything. So I'm going to throw out a few hypothetical generation names out there.

Good and Evil

Introversion and Extroversion

Order and Chaos

Positive and Negative

Blond and Brunette

Democrat and Republican

Mario and Wario

Star Wars and Star Trek

Cute and Ugly

Peanut Butter and Jelly

Times New Roman and Comic Sans