The context menu can be styled using CSS.

CSS Themes

Apply the CSS theme by enabling CssOnly mode (CssOnly = true). Specify the theme name using CssClassPrefix property.

Sample CSS Theme

menu_default.css

.menu_default_main
{
	font-family: Tahoma, Arial, Sans-Serif;
	font-size: 8pt;
	border: 1px solid #dddddd;
	background-color: white;	
	padding: 0px;
	cursor: default;
	background-image: url('menu_default/bg3white.png');
	background-repeat: repeat-y;
	border-radius: 5px;
	/*border: 1px solid #7cb316;*/
	-moz-box-shadow:
		0px 2px 3px rgba(000,000,000,0.3),
		inset 0px 0px 2px rgba(255,255,255,0.8);
	-webkit-box-shadow:
		0px 2px 3px rgba(000,000,000,0.3),
		inset 0px 0px 2px rgba(255,255,255,0.8);
	box-shadow:
		0px 2px 3px rgba(000,000,000,0.3),
		inset 0px 0px 2px rgba(255,255,255,0.8);
}

/* title */
.menu_default_title
{
	background-color: #f2f2f2;
	border-bottom: 1px solid gray;
	padding: 4px 4px 4px 37px;
}

.menu_default_main a {
	padding: 2px 2px 2px 35px;
	color: black;
	text-decoration: none;
	cursor: default;
}

.menu_default_main a img 
{
	margin-left: 6px;
	margin-top: 2px;
}

.menu_default_main a span 
{
	display: block;
	height: 20px;
	line-height: 20px;
	width: 150px; 
	overflow:hidden;
	padding-left: 2px;
	padding-right: 20px;
}

.menu_default_main a:hover {
	/*color: #fff;*/
	background: #eeeeee;
	background: -moz-linear-gradient(
		top,
		#efefef 0%,
		#e6e6e6);
	background: -webkit-gradient(
		linear, left top, left bottom, 
		from(#efefef),
		to(#e6e6e6));
	filter: progid:DXImageTransform.Microsoft.Gradient(startColorStr="#efefef", endColorStr="#e6e6e6");
}

.menu_default_main div div  /* separator */
{
	border-top: 1px solid #dddddd;
	margin-top: 2px;
	margin-bottom: 2px;
	margin-left: 28px;
}