KC I personally feel that a guns color is more of importance too us than it is too the game! IMHO the only real consideration for waterfowl and turkey hunting is that the gun be as dull finished as possible. A turkey won't know the difference between shadowgrass and dull pink, but let him catch a glimpse of a shiny blued barrel at 70yds and it is, "We're out of here". Ducks likewise will see a shiny barrel sticking from out of a brushed blind. But if both situations see a hunter using a dull finished black, I suppose the only thing you need to worry about is whether you are going to grill or fry up the victims?
Camo is all about marketing, the most effective patterns (ASAT, Skyline and other "non-pattern" camos) have the least eye appeal too humans. It is the "pretty" and "geewhiz" factor of the latest and greatest from Real Tree and Mossy Oak that sell, therefore they are the ones that get the most attention.
RA