The theme provides options to change the colors of all the main elements, so you can very easily build your custom skin. Here are some examples of different skins you can create with the theme options only:
In the Options Panel you can select one of the predefined colors of the theme or you can pick your custom color for the main sections. Also you can select a theme background pattern or you can upload your own pattern image.
You can also pick your custom colors for the rest of the main theme elements: