Menjelajah dunia dengan ilmu

Enter the gdm.conf file (sudo gedit /etc/gdm/gdm.conf). About two-thirds of the way down you will see the lines:

 BackgroundColor=#dab082
 GraphicalThemedColor=#dab082

Change it to what you like. For all black, use:

 BackgroundColor=#000000
 GraphicalThemedColor=#000000