For a documentation I changed the background color of my Windows Server 2008 R2 to
white. After I finished my documentation I wanted to change the colors back to
the default Windows Server Background Color. I realized that this was not a
default Color to choose. But you can set the color by enter the RGB values.

The RGB values for Windows Server 2008 R2 Desktop are:

Red = 58
Green = 110
Blue = 165