It seems to me there's a dark grey jumpsuited guy in ANH in a scene or two... Tough to make out though, but you can see a clear differenc in the color of the jumpsuit to the "armor" the guy has on in at least one shot... It looks almost like it's leather sewn to a dark grey jumpsuit... Hasbro caught it and did the 12" Death Star Gunner figure (FAO exclusive) that's really similar to what I saw in ANH... Seems I wasn't the only one. Definitely not an all black uniform though. It's very unique looking and rather colorful for an Impy Uniform actually.
If I'm every able to get a screen cap, I will do so... Wish I had a DVD player on my computer, haha.