LOL, thanks for the laugh, guys
I don't think this will be of much help, but to the very few interviews I went, I wore black. All my clothes are black, but the ones I wear every day have skulls or reapers or other unacceptable stuff on them. Wearing plain black cothes that could be considered somewhat elegant by a little stretch of one's imagination was as far as I went

And no, I didn't remove my nose piercing.
Seriously though, I do think the rules they taught you in college are outdated. Think of the movies or TV-shows when they show job interviews: no one is dressed exactly like that. I think the only requirement is that you look sharp. But it also depends on what job you're applying for... Insurance company or tattoo parlour will have very different standards I guess