Root giving a 404 not found

[Twysted]

Bet you don't know how to change the background color of the Header (removed or not) especially - when removed there is that bad pink color...
I have tried all of these (one at a time) and they don't do it:
#header {
background-color:#FFF8DC;
}
#header_area {
background-color:#FFF8DC;
}
#header_area {
background: url('http://www.whenlifegivesyoulemons.com.au/images/lemon-logo.png');
background-repeat: no-repeat;
background-size: 100%;
}
Thanks for your help.
Paul

this is the code for the css for the logo header area where the pink color is defined.

#header #logo {
float: left;
background-color: #FF3399; //pink color
}