A.blueback {text-decoration: none; color: white;}
A.blueback:hover {text-decoration: underline; color: white; FONT-WEIGHT: bold;}

A.whiteback {color: blue;}
A.whiteback:hover {text-decoration: none; color: 8BC5F3;}

BODY { FONT-FAMILY: Verdana, Arial, Helvetica,sans-serif; }
A { TEXT-DECORATION: none; }
A:hover {TEXT-DECORATION: underline;}
<!--- A:visited  --->