CSS Flexslider Please Help- BluChic Isabelle Theme

I did not realize Blu Chic provides almost no help when it comes to tweaking customziations for their paid theme. So I’m left to google and forums for help in CSS. I am trying to change the color of the nav left and right button on the flexslider (or even change the image there..preferably just so they are a small arrow). Can anyone help tell me what CSS I could modify/add? I tried to use firebug to inspect element but I didn’t understand how to modify. Same for the title bar on the bottom of the flexslider.

My site is https://taketimeaway.com

Thanks!