Unwanted colors

I am having trouble locating some colors on my game club theme. I did most of what i needed to do and I dont know much about CSS yet. The url is www.beautyonthesea.com . I am truing to get rid of the extra yellows and oranges.

Hi!
You can find the code :

#mainmenu-container {
		height:51px;
		background:url(images/mainmenu.png) left top repeat-x;

in the file style.css. It sets the background of the main menu. You have to edit this image to change your menu.