How to change the color of links inside a post.

Hi,
My site has a gray font and the links are dark gray. I like the way this looks on the sidebar of my site because it does not detract attention from the posts. However, Inside the posts the links are hard to see and I would like to use a brighter color for links. I know i can probably go through every post and change each link color individually. But is there something i can do in the style sheet or anywhere else that will permanently change this? I am using Silver Lexus theme. Here is an example of what a post looks like.
Thanks guys:)