Roger's rangers was initially a provincial company from the colony of New Hampshire, attached to the British army during the Seven years war. It was trained by the Major Robert Rogers as a rapidly deployable light infantry force tasked mainly with reconnaissance as well as conducting special operations against distant targets.
I use to clear some areas on my miniatures (like the skin) with the base color after the shading with the "quick shade".
Most of them wear some indian leggins or use tomahawks instead of the traditional knife.
Note that there are various tones of green, to represent the fact that there is no official production for their clothes.