This article contains steps on how to customize your buyers site with theme templates.
Note that this feature is only available in Storefront.
Storefront has created a library of custom themes that sellers can use to customize their buyer sites. These come in a variety of styles and colors to give buyer sites a professional, custom look.
Sometimes the browser cache might need to be cleared to refresh the page with new images and style sheets. Depending on the browser, Shift+F5, Ctrl+F5 or Cmd+R on a Mac will force your browser to get a new version of the web page. Specific instructions for clearing the browser's cache can be found at http://en.wikipedia.org/wiki/Wikipedia:Bypass_your_cache
In order to assign any of the themes that are shared among all seller interfaces, follow these instructions:
The next time a buyer user logs into his site, he will see a more professional, more appealing custom theme, especially when compared to the Default theme that is applied when buyer catalogs are created. For more information about custom themes, contact Sitecore Support by submitting a case.