Thread:Cqm/@comment-4623180-20120428024847/@comment-3335785-20120509101015

color: #3A3A3A; font-size: 13px; font-weight: bold; padding-top: 1px; padding-left: 10px; background: #CABB9B; }
 * 1) WallNotifications .subnav .notifications-header span {

Is the code for the header by itself. Ignore verything except the background:

background: #CABB9B; }
 * 1) WallNotifications .subnav .notifications-header span {

And then use what you normally do to alter the background. It might take some fiddling to get it in the correct place though.