Achei...
/* Main Background */
html, #body {background: #414141;}
#page-bg {background: #414141 url(../images/style8/color-bg.jpg) 50% 0 no-repeat;}
#main-header {background: url(../images/style8/header-trans-bg.png) 0 100% repeat-x;}
#main-body-bg {background: #1C1C1C;}