Customizing input[type="range"] with CSS
Info from http://glazkov.com/2011/01/14/what-the-heck-is-shadow-dom/
by yahyaKACEM
HTML
<input type="range" min="0" max="100" />
CSS
input[type=range] {
-webkit-appearance: none;
background-color: silver;
width: 200px;
height:20px;
}
input[type="range"]::-webkit-slider-thumb {
-webkit-appearance: none;
background-color: #666;
opacity: 0.5;
width: 10px;
height: 26px;
}