Appropriate attire for a graphic design interview?

I’m going on an interview next Friday for an in-house graphic design position. I’ve been working professionally for over 4 years. I’ve never worn a suit to an interview. I just purchased a houndstooth knee-length skirt and a dark blue button down. I’ll probably wear nude hose and closed toe heels. Is this appropriate? Do I need a jacket? Should I be wearing a suit?

I’m nervous about the interview and want to be comfortable, but also appropriate.