WP_Customize_Background_Image_Control not working

Hello guys,
I am having trouble using this class WP_Customize_Background_Image_Control in theme customizer.

What I want to do is add a background image that user can choose. But when try to add that field it’s not working.
But when I use WP_Customize_Color_Control instead of WP_Customize_Background_Image_Control it is working ok, I am getting field for changing color.

Code is at the bottom.
Thank you

add_action ('admin_menu', 'themedemo_admin');
function themedemo_admin() {
    // add the Customize link to the admin menu
    add_theme_page( 'Customize', 'Customize', 'edit_theme_options', 'customize.php' );
}

add_action('customize_register', 'theme_customize');
function theme_customize($wp_customize) {

    $wp_customize->add_section( 'site_colors', array(
        'title'          => 'Colors',
        'priority'       => 35,
    ) );

    $wp_customize->add_setting( 'header_color', array(

    ) );

    $wp_customize->add_control(
	new WP_Customize_Background_Image_Control(
	$wp_customize,
	'control_id',
	array(
		'label'      => __( 'Header Color', 'mytheme' ),
		'section'    => 'site_colors',
		'settings'   => 'header_color',

	) )
);

    $wp_customize->get_setting( 'header_color' )->transport = 'postMessage';

}