SuperSite for Windows posted a news story that Windows 8 comes with an Aero Auto-Colorization feature

In Windows 7, Microsoft added a new Personalization interface, allowing users to customize their desktops as they wished. But a few obvious features were missing, and in Windows 8, the company is finally filling in the gaps. Today's revelation is one such feature: The ability to automatically configure the color of Aero elements, like the Start Menu, Windows Explorer windows, and the taskbar based on the desktop wallpaper.

  Aero Auto-Colorization in Windows 8