Adding script with Shortcode

functions.php

<?php

/**
 * Register Scripts 
 *
 */
function be_register_scripts() {
	wp_register_style( 'be-shortcode', get_stylesheet_directory_uri() . '/assets/css/shortcode.css' );
	wp_register_style( 'be-shortcode-color1', get_stylesheet_directory_uri() . '/assets/css/color1-shortcode.css' );
	wp_register_style( 'be-shortcode-color2', get_stylesheet_directory_uri() . '/assets/css/color2-shortcode.css' );
	wp_register_style( 'be-shortcode-color3', get_stylesheet_directory_uri() . '/assets/css/color3-shortcode.css' );
	wp_register_style( 'be-shortcode-color4', get_stylesheet_directory_uri() . '/assets/css/color4-shortcode.css' );
}
add_action( 'wp_enqueue_scripts', 'be_register_scripts' );
/**
 * My Shortcode 
 *
 */
function be_shortcode( $atts = array() ) {
	$color = '';
	if ( $atts['color'] ) {
		$color = '-' . $atts['color'];
	}

  wp_enqueue_style( 'be-shortcode' . $color );
  return 'Hello World';
}
add_shortcode( 'be_shortcode', 'be_shortcode' );