1, right click start → run;
2, in the operation input: Regedit Press the ENTER key, open Registry Editor;
3, sequentially positioned to: Hkey_current_usercontrol Panel;
4, find control panelcolors;
5, then on the right side of the bottom to find windows;
6. Double-click Windows to open to set up. Remember that the default white background is: 255 255 255;
7, in the numerical data of the original 255 255 255 (white background) to light green: 204 232 207→ determine;
8, after the modification, this is the case, but also need to log off (or restart the computer), will be effective;
9, after the cancellation, again open the registry, where the window background color has been changed;
10, if you double-click windows, the numerical data set to this value (the color of their own tone is softer, try it): 222 254 253.
The win8.1 system window background color can be successfully dimmed with the above method