At first glance, it may seem that you cannot change Microsoft Outlook 2010’s silver default background color, which is also known as the color scheme. However, there are also two other available color options — which are black and blue — that you can use to change the program’s background color. The option to change the color scheme is in the User Interface Options section of the Outlook Options Settings menu.
Launch Microsoft Outlook, and then click the File tab. Select Options from the drop-down menu to open the Outlook Options window.
Click the General tab, and then click the Color Scheme drop-down box in the User Interface Options section.
Select a new color from the drop-down list, such as “Black.” Click the OK button to save the setting and apply the new background color.