do you mean this titles?
if yes : than open
your template style.css
find this
.forum-buttons a, .forum-buttons a:visited {
color: #ffffff; <---[here you can change color of titles]
font-weight: bold;
text-decoration: none;
vertical-align: top;
}
and for mause over
.forum-buttons a:hover, .forum-buttons a:active {
color: #abeb01; <---[here you can change mause over color of titles]
font-weight: bold;
/*font-size: 11px;*/
text-decoration: none;
vertical-align: top;
}
note : you change only what is betwen # and ;
like this:
color: #ff0000; or color: #dddddd;
it would be good that you backup your template style.css before you do this