genesis-front-end-color-switcher.php

<?php
/**
* Define color choices for a Genesis Child Theme
* and then set up a way for them to be changed from the
* front end in a theme demo.
*
* @author FAT Media <http://youneedfat.com>
* @copyright Copyright (c) 2013, FAT Media, LLC
* @license GPL-2.0+
*/

/**
* Add theme support for different color styles.
* These theme names will then be used in the selector so
* users can switch the colors from the front end of a theme demo.
*/
add_theme_support( 'genesis-style-selector', array(
		'theme-name-color-one'    => __( 'Color One', 'theme-name' ),
		'theme-name-color-two'    => __( 'Color Two', 'theme-name' ),
		'theme-name-color-three'  => __( 'Color Three', 'theme-name' ),
	)
);

add_filter( 'body_class', 'theme_name_color_switch_class' );
/**
 * Allow the color classes to be changed from the
 * front end of a theme demo.
 */
function theme_name_color_switch_class( $classes ) {
  $theme = 'theme-name';
	$sep = '-';
	$colors = array( 'color-one', 'color-two', 'color-three' );

	if( isset( $_GET['color'] ) & in_array( $_GET['color'], $colors ) )
	$classes[] = $theme . $sep . esc_attr( $_GET['color'] );

	return $classes;
}