I would like to know how to change the skin from the menu, as I would like to assign different sections of my site a separate color.
Your request is out of our support scope because we don't support to customize our themes. However, you could see the code to change skin from menu at the function tb_nex_preprocess_node located at sites/all/theme/tb_nex/template.php. Hope it helpful for you.
Thanks for your response. I just wanted to mimic the process that is used on your starter kit, where when you click on a menu option under the Skin Main menu, to change the skin color.