Did you already get this working? I just took a look at your site and the background is already white.
Line 165 is the place to change it (currently).
Also, I noticed an error while looking at your CSS
body {
background-color: #fff; //
dkp was f2f2f2
// color: #333;
dkp
font-family: 'Open Sans',"Helvetica Neue", Helvetica, Arial, sans-serif;
font-size: 18px;
font-weight: 300;
line-height: 1.625;
}
It looks like you may have tried to comment out parts of the code? If so, you have to do it this way when using CSS –
/* Commented Text or Code goes here */