Background Issue & Facebook icon

Hello! My site is islandjay.com. I appreciate the help ahead 1. As you can see I have a boat and beach background. However the posts, pages, etc have no background and the beach/boat photo comes through. How can I make the background of my content white? 2. How can I make the facebook icon always blue instead of a roll over? 3. I am assuming the grey header backdrop is an image of some kind? I know how to change it to a solid cover with a little code. How can I change it to an image? Thank you Jason