I finally bought a white and black shower curtain, which is here. The picture is pretty accurate, except for the black strip, which is probably about 12 to 18 inches thick.
Now, I haven't seen the apartment (I'm moving across country), so I don't know what colors are in the bathroom, though I'm pretty sure they're neutral, if not basic white. What I would like to do is take two colors to pop the space and use them for the decor. I would use these colors for the towels (though only one color would be out at the same time). There are so many combinations, but I've thought of red and blue, as well as bold pink and blue. Are there any other combinations you guys suggest? I know pretty much anything goes, but I want to keep it streamlined and I want the two colors to compliment each other in some way.