#adminmenu .toplevel_page_justinlegal-anleitung .wp-menu-image {
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 25px auto;
  background-image: url("https://justin-legal.com/assets/logos/justin-logo.svg");
}
#adminmenu .toplevel_page_justinlegal-anleitung .wp-menu-image:before {
  content: none;
}

#adminmenu
  .toplevel_page_justinlegal-anleitung
  .wp-menu-open.toplevel_page_justinlegal-anleitung {
  background-color: #000;
}