I believe FNG did Kev...If you brought a color chip in for them to match to, any paint supply with a decent mixing setup can do it.
Sigh..I tried to get you guys to mix your own paints so long ago but gave up..LOL...I got gallons of custom brown bess out in the back. Some acrylic, some enamel, I even made up some auto enamel. The secret is to get a good close stock color. Like olive drab, then use universal tinting dyes, available at finer paint supply stores. Tinting dyes are very dense and a drop will drastically change the color of a small quantity of paint. An added bonus is that they work in both enamel and acrylic. A good supply of these in pints should last a hobbyist a long long time. A house painter...not so long
I first start with an olive drab color then add some yellow and some red to get the color to shift towards brown. If the color is still too bright burnt sienna will tone it down, never use black. Black imparts a grayish tone to everything. The colors I use are bright primaries, so that they don't muddy up the mix or make it look gray.
Mixing paint is easy, just start off little by little, you cant un mix paint. Keep a portion of the base you started out with set aside and use it to knock down the darkness if you over mix, adding white will only give you gray...again...have fun and if you screw up...I don't know nuthin!..
Matt
[img]http://www.drstranglove.com/upload/imgs/mtag1a.jpg]