If one is really going to camo up against a human opponent and be effective they need to do more than just wear a camouflage uniform...There is no one answer for an all purpose camo, you should be using foliage and vegetation from the area you plan to be working in and attaching it to your person. If one is in an urban environment then camo isn't going to help a whole lot, it will be more about staying out of sight lines as opposed to blending in. If you're in a building, staying away from windows and don't make any sudden movements. If you're moving outside, then it is about moving from one piece of concealment to another trying to limit your exposure time.
Besides, if you're close enough for any human opponent to be recognizing your camo pattern, well, you've got bigger problems then blending in since any trained person is going to see you and any non trained person won't be able to tell if you're wearing blue jeans or camo since they'll be oblivious. NOTE: US Navy SEALs regularly wore Levi jeans when they went on missions during Vietnam...