.toolbar-icon-rcf-don-admin:before {
    background-image: url(../img/heart.svg);
    filter: invert(95%) sepia(0%) saturate(0%) hue-rotate(135deg) brightness(87%) contrast(92%);
  }
  .toolbar-icon-rcf-don-admin:active:before,
  .toolbar-icon-rcf-don-admin.is-active:before {
    background-image: url(../img/heart.svg);
    filter: invert(95%) sepia(0%) saturate(0%) hue-rotate(135deg) brightness(87%) contrast(92%);
  }