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.
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We have those who think anyone who is autistic or have adhd is an indigo...
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..