Also a tau army is in the making

The three main colors of the Guardians of history are red, black, and purple. The armour is predominatly black with a small amount of silver trim. The left shoulder pad is black lined in silver, the right shoulder pad is red lined in black. The eyepeicesare purple and the bands in between the heat exhaust and the main powerplant are purple. Assault squads have the left and right shoulder pad colors switched. Terminators do not have the sympol and their terminator crux is mostly red and the right shoulder pad is mostly blank the helmet is also red.

created using games workshop space marine creator

 the before picture appears on each shoulder pad of the marine in the same color as the rim.