ul.jssocialicons > li > a.iconset-blacksquare {
  background: #222;
  color: #fff;
  border-radius: 3px !important;
  -moz-border-radius: 3px !important;
  -webkit-border-radius: 3px !important;
  -o-border-radius: 3px !important;
}

ul.jssocialicons > li > a.iconset-blacksquare:hover {
  background: #555;
}