what to add to make hover color?

what do I need to add to this to make the hover change to a color???

.sf-menu li li > a.hover,
.sf-menu li li.sfHover > a,
.sf-menu li li.current-menu-item > a,
.sf-menu li li.current_page_item > a,
.sf-menu li li {
background: none;
}

.sf-menu li li a {
border: 0;
color: #fff;
}

This is the site that im trying to make the links on the menu bar have a color on the hover.

http://www.herculesdemolition.com/newsite/home