How to Change the Logon background color from registry

The steps to edit Windows logon color are:
1. Click on start
2. Go to Run and type regedit
After that press OK. Now the registry editor will be opened.
3. Navigate to following registry value
HKEY_USERS\.DEFAULT\Control Panel\Colors
Now you can see a lot of attributes here. Select BackGround and double click on it.
Now you will get an option to change numbers as in the order X X X
Where X can be a number in between 0 and 255. These numbers shows the pixels which determine the color. The basic color code is like:
Red : 255 0 0
Green : 0 255 0
Blue : 0 0 255
Black : 0 0 0
White : 255 255 255
You can get any color by changing the pixel count.