For security. If it's too much to ask to have the armors and vests match equipped camos...can we at least get three basic colors? (Sand [current], Olive, and Black)

Something similar for insurgents would be nice too.

Personally, I would be against this. Things that change the damage model should be clearly visible on the person, so that you understand what happens when you shoot at a guy. You will be less frustrated if you can clearly see he has heavy armor and thus will need one more hit to kill than without.