And does it work too when players have mask (viper, joker, paniflov)?
I dont think so, and probably if u set skin color as default, it could aim at ur teammate, probably it's better to use it on dress (blue or brown, or similar thing).
Thas one good idea there, but like it has been mentioned. The target should be easily distinguishable from your own teammates. So the uniform color would be best bet. You would have to do something like, uni color @ the trapezoids, or @ the center most part of the shoulder. Chest will just hit vest.