How to Change Menu Color

Hi, Tikaram, I'm working on another website using the Catch Box free theme. I made some changes to the primary menu bar using the Max Mega Menu. There is still is an area on both sides of the menu bar that I don't know how to change the color. Could you please let me know how to change the menu bar background color? The website I'm working on is: http://kathiesutherland.com Thank you!