The camo would just have to blend in with the surrounding terrain, making it a lot harder to spot placed buildings etc.
As Catindabox said, that colour would have to mimic the surrounding terrain. Either mimicing the terrain they are placed on, or just a set texture for each map. (Fools road would be dark green, whereas kohat would be yellow)
This way, when you fly over a fob in a helicopter, it would hopefully be a lot harder to spot. It could possibly even hader for infantry to spot, depending on if the net went to gound level so that it looks like a hill.
Some sort of implementation would be handy but it wouldn't have to be as complicated as im describing haha.