Custom tile colors. Create custom colors for tile post types (Metro theme).

gistfile1.php

<?php

function custom_themify_theme_meta_boxes($arg) {
	array_push($arg[4]['options'][1]['meta'], array('value' => 'cyan', 'img' => 'images/layout-icons/color-cyan.png'));
	array_push($arg[4]['options'][1]['meta'], array('value' => 'silvergrape', 'img' => 'images/layout-icons/color-silvergrape.png'));
	return $arg;
};
add_filter( 'themify_do_metaboxes', 'custom_themify_theme_meta_boxes' );