Since your skirt is such a nice neutral, it really could go with anything – but I’m a big fan of neutral-on-neutral with a pop of color.
I’d like any of these tops tucked-in to your skirt (completely or partially, so show of your narrow waist) with a skinny white or brown leather belt:
http://www.urbanoutfitters.com/urban/catalog/productdetail.jsp?id=20171476 (in ivory or black and white)
With a combination of bright and/or neutral accessories like these:
Good luck! Its hard to go wrong with a great piece like that.