In past years, Apple asked developers to use only the black Apple iPhone when marketing their apps; but that restriction, which wasn't firmly enforced by Cupertino, is no longer in effect. With the launch of the new colors for both the Apple iPhone 5s and Apple iPhone 5c, Apple is now allowing developers to use other colors besides black in their marketing material. But not all of the shades can be used...Source: http://www.phonearena.com/news/Apple-asks-developers-not-to-use-gold-Apple-iPhone-5s-in-marketing-images_id48926
