That CSS function usually comes in a set. See below for a sampler.

.headnav = the ordinary state for when the text is not a link.
.headnav a = the state for when the text is a link
.headnav a:hover = the state for when the text is a link and the cursor passes over it

.headnav {
background-color : #0052ac;
color : #c7ddf8;
font-family : Verdana, Arial, Helvetica, sans-serif;
font-size : 12px;
font-weight : bold;
text-decoration : none;
}
.headnav a{
background-color : #0052ac;
color : yellow;
font-family : Verdana, Arial, Helvetica, sans-serif;
font-size : 12px;
font-weight : bold;
text-decoration : none;
}
.headnav a:hover{
background-color : #0052ac;
color : #ff8c00;
font-family : Verdana, Arial, Helvetica, sans-serif;
font-size : 12px;
font-weight : bold;
text-decoration : none;
}

Here's how it looks.

TFC
Nothing is a problem for me...