CSS Anpassungen im Wordpress Backend

wordpress.css.backend.php

add_action('admin_head', 'my_custom_admin_css');

function my_custom_admin_css() {
  echo '<style>
    /* Schriften anpassen */
	body, td, textarea, input, select {
      font-family: "Lucida Grande";
      font-size: 12px; } 
	 
	 /* oberen Balken färben */
     #wpadminbar{ background: #5FB404; }
  </style>';
}