/**
	*WordPress 后台随机颜色
	*https://zhangzifan.com/random-wordpress-admin-color.html
*/
function Bing_random_admin_color(){
	static $color;
	if( isset( $color ) ) return $color;
	$color = array_keys( $GLOBALS['_wp_admin_css_colors'] );
	$color = $color[array_rand( $color )];
	return $color;
}
add_filter( 'get_user_option_admin_color', 'Bing_random_admin_color' );