Change the background of Digg Digg from White to Black.

diggdigg-style.css

#dd_ajax_float {
  text-align:center;
	border:1px solid #bbb;
	min-width:55px;
	width:auto;
	-webkit-border-top-right-radius:5px;
	-webkit-border-bottom-right-radius:5px;
	-webkit-border-bottom-left-radius:5px;
	-webkit-border-top-left-radius:5px;
	-moz-border-radius-topright:5px;
	-moz-border-radius-bottomright:5px;
	-moz-border-radius-bottomleft:5px;
	-moz-border-radius-topleft:5px;
	border-top-right-radius:5px;
	border-bottom-right-radius:5px;
	border-bottom-left-radius:5px;
	border-top-left-radius:5px;
	-moz-background-clip:padding;
	-webkit-background-clip:padding-box;
	-webkit-box-shadow:1px 0 15px rgba(0,0,0,.2);
	-moz-box-shadow:1px 0 15px rgba(0,0,0,.2);
	box-shadow:1px 0 15px rgba(0,0,0,.2);
	padding:5px;
	position:absolute;
	display:none;
	left:-120px;
	font:10px/16px Arial;
	background:padding-box #000;
}