Link to your site?
This is your current set up which defines all link colors of the site:
a, .post-title, .post-title a, #comments > h4.current a {
color: #000;
}
You’re using the same color for text and links so it’s really hard to see what is a link and what’s not.
Do you want to use another link color within post/page content? Then you might have to create a separate function and class.
Or do you want to change the color a link has when visited or hovered?