Block column color?

[maddocks]

Hi,

would it be possible to allow the left column to have it's own background different to the page background. Like this:

From:

[img=left:1vqxpvii]http://img226.imageshack.us/img226/2218/oldkp5.gif[/img]



























to:

[img=left:1vqxpvii]http://img139.imageshack.us/img139/5576/editedpy3.gif[/img]




























Thanks