*:before, *:after {
  box-sizing: inherit;
}

#down1 {
  /*background-color: rgb(90,90,90);*/
  width: 0px;
  height: 0px;
  margin: 0 auto;
  border-left: 15px solid rgba(0,0,0,0);
  border-right: 15px solid rgba(0,0,0,0);
  border-top: 15px solid rgb(173,51,110);
}