Color categories allow you to easily identify and group associated items in Microsoft Outlook. Assign a color category to a group of interrelated items — such as notes, contacts, appointments, and e-mail messages — so that you can quickly track and organize them. You can also assign more than one color category to items.
The category colors are prominently displayed in table views, such as your Inbox, and within the open items themselves. You can rename the categories to something more meaningful to you or choose different colors for the categories. This flexibility enables you to design a color category system that fits your personal work style.
A Categorized Mail search folder has been added to Search Folders in the Navigation Pane and provides a view of all your categorized mail items. Within this folder, you can sort and group the categorized items.
On the toolbar, click Categorize .
Click All Categories.
The Add New Category dialog box opens.
In the Name box, type a name for the new color category.
Click the arrow next to Color, click the color that you want, and then click OK.
Choosing a shortcut key is optional.