I've noticed how many a post about Shadowling life have been made recently, but that's beside the point, most likely, they are around 1-30 when red, but that may change thanks to im2smart4u, 30-60 when purple, 60-85 or so when blue, and 85-x when green, and they should die, given that they most likely live longer than humans, I'd say they live up to maybe 120-150/200 years (unless they are at that very powerful level where they glow, then maybe longer).