These types of things sometimes take some detective work. Start with the skin.css file and see if any links or other settings in there are modifying what you find. Then take a look at the main CSS file for DNN, you can access that from the Site Settings page without editing any files directly.
If you look at the ASCX file for the DNN skin you'll see there's no CSS class that affects the Terms/Copyright/Privacy text. Likewise the skin.css file has no settings for links. So we look at the portal.css, in the root of the portal you're working in or edit in Site Settings. Nope, nothing there either. So the last point is the default.css, also in the root of the portal you're working on. In this are defaults for all the settings, including skin objects. You'll find the CSS for skin objects as:
.SkinObject {
font-weight: bold;
font-size: 8.5pt;
color: #003366;
font-family: Tahoma, Arial, Helvetica;
text-decoration: none;
}
Which basically answers your question. If you're trying to match a skin object with a non-skin object, you can use the style in a <span> to handle it. Something like:
<span class="SkinObject">This looks like the Privacy link</span>
Might want to brush up on the CSS hierarchy of DNN as well:
http://www.dnncreative.com/SkinningTutorials/IntroductiontoCSSandinheritanceinDotNetNuke/tabid/265/Default.aspx
Jeff