The possibilities of color combinations are unlimited! It is merely a substitute of what users do so far with this theme.
Please Note: these sites are made with the WP Version which can be found here: http://themeforest.net/item/cake-responsive-multipurpose-wordpress-theme/6913568?ref=muffingroup
But it's nothing you can't do with the HTML Version either
the content and images used in those websites are copyrighted to their respective owners.