CSS Round Button: white/white

Round button style

<div class="knob"> 
 <h2>2</h2>
</div>

/* CSS */

.knob {
 	text-align: center;
	margin: 50px;
	width: 50px;
 	height: 50px;
 	/*background: #f0f0ef; */
	
	border: 2px solid white;
 	border-radius: 90px;
 	box-shadow: 0 3px 9px #c5c2c2,
 		0 0 0 transparent inset;
 			/*	 0px 1px 6px rgba(20, 20, 20, .1); */
	 color: #828282;
	 text-shadow: 1px 1px 0 #fefefe;
	 white-space: normal;
	 font: normal normal bold 19px/.3 univers;
	 top: 0;
	 padding-top: 0;
	 background: -webkit-linear-gradient(225deg, rgb(209, 207, 207) 0.9%, rgba(238,238,238,1) 100%) #fffffe;
	 -webkit-transition: box-shadow .3s linear;
	     -moz-transition: box-shadow .3s linear;
	     -o-transition: box-shadow .3s linear;
	     -ms-transition: box-shadow .3s linear;
	     transition: box-shadow .3s linear;
 }
 
 .knob:hover {
 	box-shadow: 0 0px 0px transparent,
 	inset 0 3px 9px #c5c2c2;
 	text-shadow: -1px -1px 0 transparent;
 }