If you're going to cattle call interviews for say, medical school, a piece of advice for you.
It is suggested you wear a suit in a neutral color. Of course, this means EVERYONE wears black. I mean everyone. So, you want to be memorable, the one who stood out, right?
Get a nice medium GRAY suit. It is still neutral, but they'll be able to pick you out in a crowd. Isn't that what you want?