baron.css

.scroller_wrapper {
	position: relative;
	overflow: hidden;
}
.scroller {
	height: 100%;
	overflow-y: scroll;
	/*-webkit-overflow-scrolling: touch;*/
	/* uncomment to accelerate scrolling on iOs */
}
[class^="baron"] .scroller::-webkit-scrollbar {
	width: 0;
}
.scroller__track_v {
	display: none;
	position: absolute;
	z-index: 3;
	top: 20px;
	bottom: 20px;
	right: 5px;
	width: 8px;
	border-radius: 5px;
	background: #ddf;
	background: rgba(0, 0, 255, .1);
	pointer-events: none;
}
.scroller__track_h {
	display: none;
	position: absolute;
	z-index: 3;
	left: 20px;
	right: 20px;
	bottom: 5px;
	height: 8px;
	border-radius: 5px;
	background: #ddf;
	background: rgba(0, 0, 255, .1);
	pointer-events: none;
}
.baron .scroller__track_v {
	display: block;
}

.baron_h .scroller__track_h {
	display: block;
}

.scroller__bar_v {
	position: absolute;
	z-index: 1;
	width: 8px;
	border-radius: 3px;
	background: #987; 
	opacity: 0.5;
	-webkit-transition: opacity .2s linear;
	transition: opacity .2s linear;
	pointer-events: auto;
}

.scroller__bar_h {
	position: absolute;
	z-index: 1;
	height: 8px;
	border-radius: 3px;
	background: #987; 
	opacity: 0.5;
	-webkit-transition: opacity .2s linear;
	transition: opacity .2s linear;
	pointer-events: auto;
}

.baron .scroller__bar {
	opacity: .5;
}
.baron_h .scroller__bar_h {
	opacity: .6;
}
[class^="scroller__bar"]:hover {
	opacity: 0.8;
}