do you use reference when colouring? using your eye to try and match the suitable colours is a good start, if you have a tablet come on Group Board and have a look at what the artists are doing on there :)
i suggest finding video tutorials
http://www.youtube.com/watch?v=Y_1JP...ayer_embedded#!
this one is from MT's own Sunny! she is really good at digital painting and finding suitable colours

