They're black. As far as I know, the ISF is the only army in the world that has black uniform. It's also very ugly, if you ask me. I think the logic behind this is that if we ever fall into space or something, we won't have the slightest chance of being found and rescued, and so wouldn't be able to give away secret information, and will also save the army the price of a searching mission. There's also the old concept of all armies, that says that soldiers should look A. alike and B. stupid. When I'm in them, I feel like I'm wearing an oversized pajama. So if you thought we had those nerdy Star Trek uniform that makes Diane Troy look so marvelous, forget it.