If I'm right, then you go to the Personalization menu, and click on Window Color. There, click on the Advanced option, and from the drop down menu choose selected items, and set the color how you will.
System Manufacturer/Model Number Zen Productions OS Windows 7 Ultimate x64 CPU Intel i7-860 Motherboard Gigabyte GA-P55A-UD4P Memory Corsair Dominator 1600Mhz, 8-8-8-24 1.65v 2x2GB Graphics Card ATI Radeon 5770 HD Sound Card Intel High Definition Sound Monitor(s) Displays Samsung P2570HD Screen Resolution 1920x1080
Keyboard Logitech G110 Mouse Logitech MX Revolution PSU Corsair CMPSU-750HX 750W Case Antec p183 Cooling Corsair H50 Water Cooler Hard Drives Western Digital Caviar Black 500gb Internet Speed 768 mb/s
System Manufacturer/Model Number Zen Productions OS Windows 7 Ultimate x64 CPU Intel i7-860 Motherboard Gigabyte GA-P55A-UD4P Memory Corsair Dominator 1600Mhz, 8-8-8-24 1.65v 2x2GB Graphics Card ATI Radeon 5770 HD Sound Card Intel High Definition Sound Monitor(s) Displays Samsung P2570HD Screen Resolution 1920x1080
Keyboard Logitech G110 Mouse Logitech MX Revolution PSU Corsair CMPSU-750HX 750W Case Antec p183 Cooling Corsair H50 Water Cooler Hard Drives Western Digital Caviar Black 500gb Internet Speed 768 mb/s