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// Register Theme Features
function custom_theme_features()  {

	// Add theme support for Custom Background
	$background_args = array(
		'default-color'          => '888888',
		'default-image'          => '',
		'wp-head-callback'       => '',
		'admin-head-callback'    => '',
		'admin-preview-callback' => '',
	);
	add_theme_support( 'custom-background', $background_args );
}

// Hook into the 'after_setup_theme' action
add_action( 'after_setup_theme', 'custom_theme_features' );