Style Question - Changing Outline Color

[Maxman1544]

Alright I think this is a simple question but I can't find the answer. I am trying to modify a skin that I bought and I can't figure out how to change the color (blue) that wraps around each forum (Football, Other Stuff, Other Sports, etc).

http://www.jetnation.com/forums/index.php?styleid=5

Can someone tell me where that setting is please?

Thanks!