.button {
 color: #000000;
 background-color: #99B3FF;
 border-left: 2px solid #CCCCCC;
 border-top: 2px solid #CCCCCC;
 border-right: 2px solid darkblue;
 border-bottom: 2px solid darkblue;
 text-decoration: none;
} 

.button:hover {
 color: darkblue;
 background-color: #99B3FF;
 border-left: 2px solid darkblue;
 border-top: 2px solid darkblue;
 border-right: 2px solid #CCCCCC;
 border-bottom: 2px solid #CCCCCC;
 text-decoration: none;
}