Here is a picture I was working on a while back. I'm looking at this as inspiration for the new pieces I'm currently drawing - some bits of it I like, some I don't (some of the colours are terrible, for example). I have to admit that I'm at my most creatively insecure when it comes to colour! I just don't know how to work out what goes with what. I blogged about it once many years ago and someone commented that it helps to paint one all-over base colour first and work up from there. That did help a lot actually, so if you're still reading my blog lovely commenter, thank you for your advice (I didn't follow it above obviously). Another thing I've noticed when looking at other people's pictures is that a lot of artists seem to choose two main colours and use variations of only these two, perhaps with occasional small highlights of another colour. This is also something I might try.
If you're reading and you have any particular tricks with colour I'd love to hear them!