For the Neu Habsburg Colonial Militia I have opted for an Astronomican Grey coat followed by a Asurmen Blue wash and a highlight of Space Wolf Grey. This gives the uniform a blue-grey feel, that I even might use for my 15mm WW1 Austro-Hungarians. I imagine the Neu Habsburg Colonial Militia only being issued with one type of uniform, a standard uniform and without any terrain specific camouflage. The standard uniform is mainly to be used within the colonial settlement, and the militia's main task is to uphold security and policing functions within the colony, not conduct military combat.
Hopefully, my current vacation will make it possible to have the 16 miniatures I own painted and based before bedtime today. The miniatures will be organised into 2 patrol squads and 1 heavy support squad.