Hi there,

All market title styling is controlled on lines 295-337 of the style.css file...

/*---MARKER TITLE POPUP---*/
.markerTitle {
	font-size:10px;
	color:#fff;
	width:120px;
	display: none;
	position: absolute;
	bottom: 32px;
	bottom: 0;
	left: -65px;
	padding:7px;
	text-align:center;
	border: 1px solid #000;
	background: #171717;
	background: -webkit-gradient(linear, left top, left bottom, from(#323232), to(#171717));
	background: -moz-linear-gradient(top,  #323232,  #171717);
	-moz-border-radius: 3px;
	-webkit-border-radius: 3px;
	border-radius: 3px;
}
.markerTitle:before {
	border: 1px solid #333;
	border: 1px solid rgba(255,2555,255,.05);
	content:"";
	position: absolute;
	top: 0;
	left: 0;
	right:0;
	bottom:0;
	z-index: 0;
}
.markerTitle:after {
   content:"";
   display:block;
   position:absolute;
   bottom:-7px;
   z-index: 1000;
   left:55px;
   width:0;
   border-width:8px 8px 0;
   border-style:solid;
   border-color:#171717 transparent;
}

The .markerTitle:before part above is responsible for the arrow styling. It's using a CSS border method, so adjust the border color there.

Let me know if that helps.

Best,

Chris

I change color of #markerTitle and I am looking in source for arrow below markerTitle label.
Is it image? How to change color of that arrow?