Change mainmenu background color

I changed the background color of the mainmenu. But it seems only to affect on the homepage and have to change the others pages individually. Is there a way to change it all in one? www.tweestrijd.nu

}
.frontpage #gk-header {
background: #263133 none repeat scroll 0 0;
}

Hi,

Please use the following code for other pages:

Code: Select all

#gk-header {
background: #263133 none repeat scroll 0 0;
}