If you Cerakote, I would try mixing up Patriot Brown and Sig Dark Grey, maybe adding a little bit of Magpul OD Green.
If looking for off the shelf paints, you can mix up custom colors by spraying rattle cans into a bottle or container until the desired ratio is achieved. Test every now and then with a q-tip on a test piece. Dry the test swatch with a heat gun (as you know, wet paint is always darker). Cover the mouth of the bottle with a paper towel to catch splatter, and remember these paints will still retain some aerosols and will be under pressure if you seal a lid on the container for future use--crack them every now and then to relieve gas. You can then strain this paint into your HVLP gun. I mixed up various brands of camouflage paint to achieve the Multicam palette for my Holland, and sprayed through an Iwata LPH-80:
Attached File Attached File Attached FileI haven't tried this vendor before, but it looks like LVP Paints can mix up your desired color in rattle can form here:
LVP Paints RAL 7013 Attached File