I have spent quite alot of time on this site for most of 2010 and it seems to be that the only purpose of those labels is to engender a cliche of superiority, specialness and exclusiveness for phenomena that many people experience in different ways..
We have those here who think high IQ = indigo special person. Perhaps they should join mensa and do some puzzles.
We have those who think anyone who is autistic or have adhd is an indigo...
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We have those who experience spiritual insights or exhibit artistic talent... they are indigo..
We have those with psychic abilities and they are labeled as indigo.
This concept of an indigo , crystal, rainbow is make believe....just sayin after observation here... it's a nonsense really.. sorry..