I can say that early in the war (2003), USMC crew had the desert-color flight suit, the basic OD-green survival vest over that, and then an olive-colored vest known as a "chicken plate" that allowed a large ballistic plate to cover their chest area. Marine aviators have camoflauge covers over their helmets....and most of these were still in the green-scheme early on.....but I suspect that most have changed to a desert-colored cover by now.
If you wanted a really interesting uniform, you could have cobra pilots dressed in MOPP-bottom suspender pants and green skivvy shirts! This was while we were operating under the chemical/biological threat, and the idea was, if our crews received a warning that an NBC event had occurred, they would land, throw on their MOPP-top and gas mask, and continue the fight. Of course, the real reason for flying in suspender-pants and a t-shirt was that it was a heck of a lot cooler!