Recoloring special effects

[masterofra]

Is is possible to recolor the big bad voodoo aura effect, not the effect on the hero, but the effect on the rest of them, to be a different color? I would prefer to be able to do it myself, but i dont know how. otherwise, i would need 4 recolored models, being a blue(like mana shield), green, aqua,and a black. Im trying to make custom shield spells, but the mana shield one is too laggy if i mass it.
I realy just need a lower complexity model for my game, to prevent lag.