How to change the background colour of a window?

 How to change the background colour of a window?
http://askubuntu.com/questions/68003/how-to-change-the-background-colour-of-a-window
First install dconf-editor if you dont have it already:
sudo apt-get install dconf-tools
And then run the dconf editor:

sudo dconf-editor

Browse to org.gnome.desktop.interface and locate: gtk-color-scheme

Edit the property to the colours of your choosing:

 >> add with it
bg_color:#ebe0be;selected_bg_color:#737370;base_color:#ffd39b
or
bg_color:#f0f1f2;selected_bg_color:#4677f0


The colours are in hexadecimal in the format #RedRedGreedGreedBlueBlue
For example:
    Black = #000000 (None of any colour)
    White = #ffffff (The maximum
    of every colour) Red = #ff0000 (Red Only)
Happy Customising!

(add-hook 'org-mode-hook 'css-color-turn-on-in-buffer)