Assign path to a variable and use in wp_enqueue_style

Hi,

I use this in functions.php

if ( !function_exists( 'theme_scripts' ) ) {
	$get_sitestyle = array("brown", "default", "green", "gray", "red");
	$stylepath =  get_template_directory_uri() . '/' . $get_sitestyle[of_get_option('of_alt_stylesheet')] . '.css';

	function theme_scripts() {
		wp_enqueue_style('style', get_stylesheet_uri(), false);
		wp_enqueue_style('color-scheme', $stylepath);

		some javascripts....
	}

	if (!is_admin()) {
		add_action( 'wp_print_scripts', 'theme_scripts' );
	}
}

When i echo $stylepath, it displays correct path with no problem, but when using it in wp_enqueue_style -> it won’t print the path to site header.

Anyone knows how do i fix it?

Thanks