Ties Conservative is the rule of the day. Your tie should be conservative. Make sure that the tie goes with the suit. In men's clothing ties are the item that makes a statement about the wearer. This is not the time to make strong statements about your individuality.
Flashy ties are out in the interview process.
You want the recruiter to look you in the eye and focus on you and your abilities, not your tie. Mickey Mouse ties and ties that look like prize rainbow trout are amusing and the interview is not the place for them. Socks Black socks are the best call. They go with anything including blue suits. You can also wear blue or grey depending on your suit.