Yea, its getting complex already, but its complex in a good way since we're doing it steps at a time and the whole thing is interlinked anyways.
@mudkipz: Same thing for fire, a cool (relatively) flame is reddish and a hot flame is blue. Stars and fire are both the same state of matter though, which is plasma.
Also, what about temperature, I thought luminosity and temperature were interlinked?