Hi,
In order to change the Author's name as listed in the Site News or other forums, you can use:
.author a:link { color: orange; }
.author a:visited { color: blue; }
.author a:hover {color: red; text-decoration: none; }
.author a:active { color: green; }
More help here...
http://www.w3schools.com/css/css_link.asp
Cheers
Mary