The leaked parts include the volume control buttons and the silent/vibrate toggle switch. We would expect that a champagne colored iPhone 5S would be one color option for buyers to pick from along with the traditional black and white and perhaps some other colors as well.
As usual, there have been quite a number of rumors about the next iteration of the Apple iPhone, and this year we have all of that added speculation thanks to those additional rumors about a low-cost variant of the iPhone. We expect Apple to unveil the new iPhone models on September 18th with the launch taking place not too long afterward, on September 27th.
source: LunaCommerce via RedmondPie