I didn't want to spend too long painting these, so I went for a relatively simple paint job. The main colour is Vallejo Middlestone. I then hit it with a black wash and reapplied the Middlestone. I added a bit of white to the Middlestone for the claws. The colourful bits are painted Vallejo Magenta. This gives some really nice contrast to the models, and I think makes them nice and 'buggy'. This is especially important as I plan on using them in other games such as Stargrave and Operation: Last Train as well.
So, truthfully, I only used 4 colours for these figures (not counting the two for the base).
Five down, 17 to go!