Here's the code I use for mine:
#wpcombar {
background:#8b6689;
border-bottom:1px solid #777;
color:#fff;
font:12px "Lucida Grande","Lucida Sans Unicode",Tahoma,Verdana;
height:27px;
left:0;
position:absolute;
top:0;
width:100%;
margin:0;
}
#wpcombar .menupop ul {
background:#8b6689;
border:1px solid #777;
left:-999em;
position:absolute;
border-width:0 1px 1px;
}
#wpcombar .quicklinks a,.blogmeta {
background:#8b6689;
border:none;
color:#f7f7d5;
display:block;
font:12px "Lucida Grande","Lucida Sans Unicode",Tahoma,Verdana;
font-weight:normal;
letter-spacing:normal;
text-decoration:none;
font-style:italic;
padding:0.5em 1em;
}
Obviously you can set the colours and fonts as you'd like them, or not at all.