Basically, all it is is ROTF Ravage's face in SG colors.

That's all, other than it being an avatar. 150x150 would be nice.

Did you try just inverting it in Paint? Might make it white.

Well it wasn't in paint, but here's a color inversion of ROTF Ravage. Frankly, I think you're better off sticking to your current SG Ravage.

Maybe a white version of the Robot Hero movie Ravage might work. (Uhm... just started on one & no, that doesn't work either.)

Kevin
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I tried adding a little more SG Ravage effects to him, but I can't say its much of an improvement. The yellow eye & red tongue just make him more disturbing.

Click to view attachment

... Yeah, he does looke a bit too creepy... Oh, well. Nice job, though.