Is there an easy way to change the colors

Is there an easy way to change the colors of the top and bottom purple bars?  
Want to use lighter colors instead of the dark purple.

Also, how can we make the height of the top header purple bar smaller.  
I took out the small $ menu on the top but the height of the top bar stays the same.

Nevermind, I think I got it.  It's the background.jpg image in img folder.