Edit the .menu style in templates/css/style.css for changing the header menu color

Code:
a.menu, a.menu:link, a.menu:link:visited {
font-family: Verdana, Arial;
font-size: 14px;
color: #FFFFFF;
font-weight: bold;
}

a.menu:hover { color: #FF0; }

Findout the div.section div.hd from syle.css and modify with new link color.

Code:
div.section div.hd {
height: 1.5em;
color: #FFFFFF;
font-family:verdana;
font-size:12px;
font-weight:bold;
padding:5px 0px 5px 2px;
overflow: hidden;
border-left:5px solid #5c7099;
border-right:5px solid #5c7099;
background-image: url("../images/bg1.gif");
}

div.section div.hd a {
color: #FFFFFF;
}

div.section div.hd a:hover {
color: #FF0;