For this demo the Stardom theme customizer was used to create 3 different styles(dark, blue, orange). After creating each style the "Generate CSS" button was used to generate all of the CSS. The styles were then copied to their OWN stylesheet. Only one line of Javascript was used to create a function which toggles between the saved stylesheets. This demo was the result. Please note that only 3 styles were created for this demo, but an infinte amount of styles could be added.