.quote {
  border-radius: 10px;
  position: relative;
  padding: 20px;
  background-color: red;
  color: white;
}
.quote:after {
  position: absolute;
  content: '';
  width: 0;
  height: 0;
  border: 20px solid transparent;
  border-top-color: red;
  bottom: -39px;
  left: 20px;
}


420 0 0