Hi,
We don't expose any properties that would hard code colors on links as that would be contrary to a skinnable design. We want tobe able to change all aspects of the site design by simply changing the skin so we avoid anything that will hard code styles that won't change when the skin is changed. You can style links in the css for your skin. The links are wrapped in li items with the css class linkitem and linkaltitem on the alternate rows. So those are classes you could use to style the links.
Note that if you need more control over individual link styling, you can just use an html module and create the list of links however you like using the source view to edit raw html. The Links feature is just a convenience, there is nothing it can do that you could not do in the html module. You could even create a content template with links formatted how you like them to make it easy to create a styled list of links using the Html module.
Hope it helps,
Joe