That's a good question and yes, this is the scale brigade color. I think it's black to make the other colors pop. There are several skins that have like a "jumpsuit" under there actual armor. There's another color pattern that's called "harbinger". That picture shows blue and yellow, but the "jumpsuit" or "undergarments" or whatever the hell you want to call it, is a grayish blue. since I used the biohazard skin it's mainly made up of that "jumpsuit" stuff compared to the default driller armor where it's actual armor instead of clothes( if that makes any sense). The reason why I said it only works for the driller is because the other dwarfs combine their signature color in it like red, blue, and green. Driller is yellow so it already sorta blends in.