I wasn't sure how I wanted to paint these guys. I really like the pictures from Privateer Press.
They are brown but the tones are more gray than anything else. I had no idea how to get that color and I don't purchase the P3 paints (Privateers line of paints). They seem to be great paints but they are pricey. I have used Folk Art Paints (you can get them at any hobby store and perhaps even Wal-Mart) and I like them, especially their artist pigments. They have gold caps rather than white and the pigment is more highly concentrated.
So I pulled out every brown that I had, which wasn't many, and did a test page. Load your brush up and drag it across the page. This shows the range of colors you can get from one paint. Important to remember - label the paints on the test page. I thought I would remember which was which but as I got interested in mixing the colors, I quickly forgot how I got to each color.
The first stripe is Folk Art's (FA) Burnt Umber #462. The second is FA Raw Sienna #452 and the third is FA Teddy Bear Tan #419. In person, the second tinges to the orange side and the third was just too light. The fourth stripe is mislabeled but (I think) it is the Teddy Bear Tan with a drop of Games Workshop Brown Ink. See what I mean about labeling your stuff right away? Apparently, GW is no longer make the ink so it may be what they are now calling washes.
I finally settled on the first stripe and just adding FA Tapioca #903. It is not a pure white, so you avoid some of the chalkiness in the final color. The mid-tone highlight will be 1:1 Burnt Umber to Tapioca. The top highlight will be about 1:2 or 1:3. I can also darken the Burnt Umber if I need to with Black or the GW Brown Ink.
I am still saving up money to buy the last three modes I need so no painting yet.