Several parts of the iPhone 5S leaked in hi-res photos including a sim card tray that is beige.
The iPhone 5S might come in beige. An image of the beige/golden iPhone 5S tray leaked on BGR along with other iPhone 5S components. The other tray in the picture is grey which would suggest that there is also a grey iPhone 5S. It also could be that somebody manipulated the colors in the photos and we stare at a black and a white iPhone 5S sim card tray.
The other components suggest that Apple is redesigning the innards of the iPhone 5S quite a bit.
The iPhone 5S is expected to have a sapphire glass with no physical home button. The home button would be a touch sensitive area with possible integrated finger print scanner.