Custom CSS for Wordpress Admin area

// Custom CSS for the whole admin area
// Add to functions.php
// Create wp-admin.css in your theme folder

function wpfme_adminCSS() {
	echo '<link rel="stylesheet" type="text/css" href="'.get_bloginfo('stylesheet_directory').'/wp-admin.css"/>';
}
add_action('admin_head', 'wpfme_adminCSS');