a.headerlink {
  display: inline-block;
  width: 23px;
  height: 23px;
  margin-left: 0.35em;
  vertical-align: middle;
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.15s ease-in-out;

  /* Option B: colorize via mask so it follows currentColor */
  background-color: currentColor;
  -webkit-mask: url("../img/anchor-link-svgrepo-com.svg") no-repeat center / contain;
  mask: url("../img/anchor-link-svgrepo-com.svg") no-repeat center / contain;
}