Background color for twitter icon and widget titles

My site is http://www.manchestersquaregroup.com and I’m trying to lighten up the background colors in the main menu and the widget titles (on the right). I can change the text color in both areas no problem, and the background color in the main menu. I can’t seem to find where the background color for the twitter icon is though. I can change the color of the bird itself, but not the little box it sits in. I want that box to be the same lighter grey as the rest of the main menu background.

I know where to change the search bar colors, so that’s ok.

I would also like to make the title bars for the widgets (“Now Available on Amazon” and “Contact Us”) have lighter backgrounds…to match the main menu! Again, I can change the text itself but can’t figure out how to change the background color there.

Any help would be greatly appreciated! Let me know if I need to include any other info. I’m using the Ping theme, but I think that will be evident in the post title, if I followed the directions in the Welcome message thing 🙂