/* Gradient color1 - color2 - color1 */

hr.style-one {
border: 0;
height: 1px;
background: #333;
background-image: -webkit-linear-gradient(left, #ccc, #333, #ccc);
background-image: -moz-linear-gradient(left, #ccc, #333, #ccc);
background-image: -ms-linear-gradient(left, #ccc, #333, #ccc);
background-image: -o-linear-gradient(left, #ccc, #333, #ccc);
}