In a default style I don't think you can via the ACP... you will need to address it via your extra.less.
If you are using a custom style, it may allow it, and it would (using PixelExit's Bolt as an example) be under ACP -> Appearance -> Styles -> Chosen Style Style Properties -> Node/Forum list -> Node Title
as it addresses the actual hyperlink itself. You can then extend that using
Less:
.node-title a:hover{color:green;font-size:25px;}
to give special effects when the link is hovered over, or using a:active when the hyperlink is the active one or a:visited to highlight already visited links (if one wanted to go to that extreme).