Background colour issue

I am having problems with my background colour.

I save the backgtound colour as white on the colour management page



but the clour doesn't change from the navy on the forum itself.

My forum URL is http://nturenegades.forumotion.co.uk/

Help please.

Going in:
ACP > Display > Pictures and Colors > CSS StyleSheet and add this code:

Code:

body {
background-color: #FFFFFF;
}