How can I style a thin blue line at top of posts?

hi...


In a nutshell, I want fastharry.com to to have a minimalist look, and I have found one I like..'


http://www.dailyfinance.com/..


Basically, I want the post header black letter on white, and a thin blue line over the post title...


I have played around with the kicker styling but can't seem to get a color to appear...


Can this be done?

Thanks