Use radio value from $wp_customize->add_control in function

function wf_customize_register( $wp_customize ) {

    // Colour Schemes
    $wp_customize->add_section('colour_scheme', array(
        'title'    => __('Colour Scheme', 'wf'),
        'priority' => 200,
    ));

    $wp_customize->add_setting('wf_theme_options[colour_scheme]', array(
        'default'        => 'jungle',
        'type'           => 'option',
        'capability'     => 'edit_theme_options',
    ));

    $wp_customize->add_control('colour_scheme', array(
        'label'      => __('Colour Scheme', 'wf'),
        'section'    => 'colour_scheme',
        'settings'   => 'wf_theme_options[colour_scheme]',
        'type'       => 'radio',
        'choices'    => array(
            'jungle' => 'Jungle',
            'sea' => 'Sea',
            'mountain' => 'Mountain',
            'woods' => 'Woods',
            'desert' => 'Desert',
        ),
    ));
}
add_action( 'customize_register', 'wf_customize_register' );

function wf_customize_css()
{
	$mods = get_theme_mods();
	var_dump($mods);

	$skin = get_theme_mod('wf_theme_options');
    ?>
    	<link rel="stylesheet" href="<?php bloginfo('template_directory') ?>/css/<?php echo $skin ?>.css" />
    <?php
}
add_action( 'wp_head', 'wf_customize_css');

I’m using customize_register( $wp_customize ) to add a skin/colour scheme option to my theme but don’t know how to grab the value from the radio button in the menu.

When I do a var_dump, the output contains: ["wonderfort_theme_options"]=> array(1) { ["colour_scheme"]=> string(3) "sea" }

How do I grab the ‘sea’ to use where $skin is? Currently it echos ‘Array’.

Thanks.