Add custom tyneMCE style in wordpress

function.php

// TyneMCE options :
// - editor style
function add_editor_styles() {
	add_editor_style( 'css/editor-style.css' );
}
add_action( 'init', 'add_editor_styles' );

// - add custom style
add_filter( 'mce_buttons_2', 'mce_editor_buttons' );
function mce_editor_buttons( $buttons ) {

    array_unshift( $buttons, 'styleselect' );
    return $buttons;
}


function mce_insert_formats( $init_array ) {  
	// Define the style_formats array
	$style_formats = array(  
		// Each array child is a format with it's own settings
		array(  
			'title' => 'Цитата',  
			'block' => 'blockquote',  
			'classes' => 'blue',
			'wrapper' => true,
			
		),  
		array(  
			'title' => 'Цитата с права',  
			'block' => 'blockquote',  
			'classes' => 'blue right',
			'wrapper' => true,
		),
	);  
	// Insert the array, JSON ENCODED, into 'style_formats'
	$init_array['style_formats'] = json_encode( $style_formats );  
	
	return $init_array;  
  
} 
// Attach callback to 'tiny_mce_before_init' 
add_filter( 'tiny_mce_before_init', 'mce_insert_formats' );