I'm not sure. Haven't seen any yet, its always been red in the films but its those kind of things that can sometimes be the coolest part that help 2 make a predator suit ur own!
I did something sort of like that w/ my lasers. I got mine from sure electronics, a seller on ebay & they are sweeeeeet...super bright plus have an adjustable focus on the beam itself. When its focus is adjusted out, away from a red dot shape, it turns into a long, thin rectanglular sort of shape. I used this to make my tri-beam look just like the targeting laser logo seen in the upper left hunters lair logo on top of the forum pages. Everyone who's seen it has absolutely loved it & I do as well.
So, just because no one else's done it yet is never a reason u shouldn't at least give it a shot & see what turns out!
If I never stepped outside the box, I wouldn't have had any of my best ideas. Trust me, I'm well known for staying WAAAAY the hell outside of anything even resembling a box...check out some of my threads & you'll see what I mean!