main_container background color

Hello i need some help please. I want to change thwe main_content background color, from white to #a18814 how can i do it.
You see in this page www.flyalbania.al/index.php/home-page/20...8-23-04-10/historiku for example its all white the background. i want to chane it, because i dont like it.

Please help me, how to do it!

Never mind thnx,. i found how to do it