Change Colors for text in News Reader

I would like to be Able to change the text colors, or use the system colors instead of the all white text, for better visibility.
Also sometimes with <!-- w --><a class="postlink" href="http://www.digg.com">www.digg.com</a><!-- w --> rss feed, the new elements show above the read ones, when the default is the opposite. I don't know if digg's feed has the problem or the reader. Thanks