Does the change in the blaster's color mean anything?
It tells you at a glance whether you have the blaster set to prefer Creeper, Digitalis, or Runners as primary targets.
I thought it indicated its effective firing speed.
I meant the reddish/greenish/bluish coloring of the barrels.
You mean the slight gradient shift as it fires? I think that's just supposed to be the barrel "heating up." Graphic effects.