How to Change Your Office 2013 Theme
Office 2013 has brought with it many changes including the new customizable background themes. These neat little designs can be found at the top right of Office programs and are customizable in design and color. You can choose from 15 different themes (Including the option of not having one at all) and 3 different colors.
For step-by-step instructions on how to customize your theme, visit http://helpdesk.etown.edu/help/theme and background