Sailors don't need camoflage. They are suck in the ship anyway, what's the point. They aren't going to shoot you one by one(No, not even sabotagers), just shoot a missile as you from 50 k away. Red camo might be good. But it's weird........
As for China, sailors have white uniform, so it improves their discipline, yet it also stands out in the water. I guess Chinese sailors have things to kill time with, just talking about the uniform.
As for the paratroopers, they have the black, gray, white uniform. It probably works well in Taiwan, but not in Basrah(comparison). But it won't work well in the fields AROUND the target city though, where they must land first.