That sounds like a self-fulfilling prophesy/excuse for them always existing, yet this "new world revolution" not yet occurring.
Kinda like Pat Robertson, and the world ending in 1982 . . .but then, he said, God decided not to. Excuse.
What you call and "indigo child" is probably just an introspective person. There's no need to assign colors, "auras," and all sorts of other devices people like to sue to make things sound mystical, mysterious, or divine. It's a common trick.
"Violets" are just activists. There will always be activists. Again, the colors/aura tags are completely unnecessary, and indeed only serve to confuse and make the concepts a bit more difficult to understand.
Furthermore, a common trait in these beliefs, is that the believer/practitioner is somehow above everyone else: "older soul," wiser, more intelligent, unique, etc. .
What do all of those things have in common? We all desire them (except for the first one, lol). So why not invent a system in which you DO posses those traits above everyone else? There you have it *sigh*
It's just you being narcissistic.
I consider it extremely rude to claim that you're "better" (subjective, in any case, which only serves to make it more infuriating) than everyone else, and so I have been explicitly unfriendly in this post. I'm tired of people creating exclusionary groups for the betterment of their own egos.