Different background on active menu tab on home

I use this code to highlight current page in the menu bar, but would like to exclude the home page. How do I do that?

/* ================================================ */
/* how to highlight current page */
/* ================================================ */
ul.rMenu li.current_page_item a:active,
ul.rMenu li.current_page_item a:visited,
ul.rMenu li.current_page_item {
color: #ffffff !important;
background: #34597F !important;
}