I am sure there are many answers to this post if you search for similar topics...
However, to answer your question, although black may be a little 'funeral-like,' I would say that its probably not worth going and buying a new suit just because the color is black. Though some may disagree...
I've worn a black suit to almost all of my interviews, except for Wisconsin which was informal...got to wear a nice shirt and slacks...no tie...woohoo!
As long as you look respectable it doesn't matter, blue or black, or gray or brown, or whatever. I seriously doubt it'll make much of a difference. You can wear the greatest looking suit on earth, but if you act like a dumba$$ in the interviews then you still won't get in.
Black is fine. It's probably one of the most commonly-worn colors in corporate America. I don't think you can walk down the streets of NYC, Boston, etc. w/o seeing a gazillion people all decked-out in black. Yeah, people wear it to funerals....but if you want to make sure you look professional or "dressy" for any occasion, then go w/ black: you can't lose.
I wear a charcol pinstrip suit with a blue shirt. Most guys I've noticed wear white shirts. Some guys have all black suits. Whatever you like is what you shoudl go with, but again if you act like a ******* in the million dollar suit then kiss your chances goodbye.
I agree with above posts that black is perfectly fine, especially if that's what you already have. BUT to quote (not quite directly) from a med school dean I know personally "Every year it's the same: masses of people showing up in black and navy blue suits. I almost want to offer admission to the first person who wears something different!"
Just thought I'd share a sentiment I'd heard from the other side...
Hey I guess a black suit is o.k but if you want to mac-out stylish you need to follow my lead.
I like to go to my interviews in a bright yellow sports coat with christmas lights outlining the sleeves. I wear red leather pants cause I couldn't find any yellow pants to match.
During my committee interviews I wear sunglasses so that the interviewers wouldn't be able to tell at who or where I was looking.
I heard they like people to be unique and I'm pretty sure I made quite an impression. We'll see.