.whatsapp {
  position: fixed;
  width: 45px;
  height: 45px;
  bottom: 90px;
  right: 31px;
  background-color: green;
  color: #fff;
  border-radius: 50px;
  text-align: center;
  font-size: 28px;
  box-shadow: 2px 2px 3px #999;
  z-index: 100;
}

.whatsapp i {
  color: white;
}

.whatsapp i:hover {
  /* color: #337ab7; */
  color: #000;
}