Open your registry and find the key below.
Modify the value named 'Background' according to the color you would like in RGB (Red/Green/Blue) format. For example, "0 0 0" for black or "255 255 255" for white, and every other color in between.
Restart Windows for the change to take effect.
Key:[HKEY_USERS\.DEFAULT\Control Panel\Colors]
Value Name: Background
Data Type: REG_SZ
Data:0 0 0 - 255 255 255
