.hexagon {
width: 100px;
height: 55px;
position: relative;
}
.hexagon, .hexagon:before, .hexagon:after {
background: red;
-moz-box-shadow: 0 0 10px rgba(0,0,0,0.8);
-webkit-box-shadow: 0 0 10px rgba(0,0,0,0.8);
box-shadow: 0 0 10px rgba(0,0,0,0.8);
}
.hexagon:before, .hexagon:after {
content: "";