arangodb/js/apps/system/aardvark/frontend/scss/_snippet.scss

.snippet-wrap {
  .snippet-num li {
    list-style: decimal-leading-zero outside none;
  }
}

.snippet-no-num {
  list-style-type: none;
  padding-left: 0;

  .prettify {
    font-size: 1.2em; 
  }

  .sh_number {
    color: #044;
  }

  .sh_symbol {
    color: #00f;
  }

  .sh_cbracket {
    color: #c7a317;
  }

  .sh_keyword {
    color: #c12dad;
  }

  .sh_string {
    color: #ce2f30;
  }

  .sh_object {
    color: #00f;
  }

  .sh_array {
    color: #00f;
  }
}