Brass or mixed materials where brass is an accent... If you have another material present that is dominant like stainless steel you can incorporate stainless as well.

Depending on your style and taste my new favorite is painted fixtures...if you like this is an excellent opportunity to purchase an an unusual antique fixture ,paint it to match walls or cabinets and have it re-wired to create a personal...interesting ...functional ...original...focal point.
With the high cost of light fixtures these days it could even save a little money to spend on something else