In templates/subsliver/subsilver.css
Find the following:
Code:/* General font families for common tags */
font, th, td, p { font-family: Verdana, Arial, Helvetica, sans-serif }
a:link, a:active, a:visited { color : #1d7148; }
a:hover { text-decoration: underline; color : #dd6900; }
The part below is what determines the link color.
Code:a:link, a:active, a:visited { color : #1d7148; }
a:hover { text-decoration: underline; color : #dd6900; }
I don't have any reccomendations for the color though. It takes me hours to schoose the right colors.
Edit:
To make it underlined use this css code:
Code:a:link, a:active, a:visited {text-decoration: underline; color : #1d7148; }
a:hover { text-decoration: underline; color : #dd6900; }