#20505
Sushil Adhikari
Moderator

There is actually…first the menu button code is found in the style.css file around line 2189. Best to do this change with a custom CSS file at least and not directly with this file. The code that does the button looks like this:

/* Main Menu Toggle */
.menu-toggle {
	padding: 6px 10px;
	font-size: 11px;
	line-height: 1.428571429;
	font-weight: normal;
	color: #7c7c7c;
	background-color: #e6e6e6;
	background-repeat: repeat-x;
	background-image: -moz-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: -ms-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: -webkit-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: -o-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: linear-gradient(top, #f4f4f4, #e6e6e6);
	border: 1px solid #d2d2d2;
	border-radius: 3px;
	box-shadow: 0 1px 2px rgba(64, 64, 64, 0.1);
}
.menu-toggle {
    cursor: default;
}
.menu-toggle:hover {
	color: #5e5e5e;
	background-color: #ebebeb;
	background-repeat: repeat-x;
	background-image: -moz-linear-gradient(top, #f9f9f9, #ebebeb);
	background-image: -ms-linear-gradient(top, #f9f9f9, #ebebeb);
	background-image: -webkit-linear-gradient(top, #f9f9f9, #ebebeb);
	background-image: -o-linear-gradient(top, #f9f9f9, #ebebeb);
	background-image: linear-gradient(top, #f9f9f9, #ebebeb);
}
.menu-toggle:active,
.menu-toggle.toggled-on {
	color: #757575;
	background-color: #e1e1e1;
	background-repeat: repeat-x;
	background-image: -moz-linear-gradient(top, #ebebeb, #e1e1e1);
	background-image: -ms-linear-gradient(top, #ebebeb, #e1e1e1);
	background-image: -webkit-linear-gradient(top, #ebebeb, #e1e1e1);
	background-image: -o-linear-gradient(top, #ebebeb, #e1e1e1);
	background-image: linear-gradient(top, #ebebeb, #e1e1e1);
	box-shadow: inset 0 0 8px 2px #c6c6c6, 0 1px 0 0 #f4f4f4;
	border: none;
}

The part that you see like this:

background-color: #e6e6e6;
	background-repeat: repeat-x;
	background-image: -moz-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: -ms-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: -webkit-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: -o-linear-gradient(top, #f4f4f4, #e6e6e6);
	background-image: linear-gradient(top, #f4f4f4, #e6e6e6);

….is CSS3 gradient colours, but you can remove that and do just a regular background colour if you wish.