Navy theme consists of a navy blue background with a white gradient for your right sidebars where you can add widgets. The left column only appears on pages with more than one post: the blog home page, search results, and archives. If you are viewing a single post or page on this theme, the left sidebar will disappear, giving the post more space on the page.
For more information on how this theme was developed, see:
LIS Blog > New WordPress Themes Available