They're done up in a blue and brass color scheme that I think works pretty well.
Unfortunately, I did make a bit of a mistake. After finishing the unit, I thought I could use a little more brass (my Citadel paint pot was about to run dry). But it wasn't until after I had started mixing the old paint with the new Vallejo paint I had bought when I realized it was the wrong color - bronze instead of brass!
Now I have a paint pot with a sort of mixture of the two, and I'll either have to buy another pot of the Citadel range, or run out to a local hobby shop, get some paint pots, and fill one of them with the Vallejo option.