[ozzy47]

Well you would first need to get the identity of each tab you want, then add this to your additional.css

#vbtab_forum a.navtab {
    background-color: black;
    color: #FBCB3D
}

#vbtab_forum a.navtab:hover {
	background-color:white;
	color:{vb:stylevar navbar_tab_selected_color};
}

This will need to be done for each tab, the identity of the example is the Forum tab, vbtab_forum

You can change the colors to anything you want, just experiment.

For future reference, please don't ask in multiple places, I saw that you asked the same question in another place after posting this.