Board Thread:Support Requests - Getting Technical/@comment-25324252-20141014164145/@comment-452-20141014171810

How I would do it:

function lightsOff { $("body").toggleClass("lightsOff"); }
 * First, create a set of dark styles in your user CSS, and get it looking exactly how you want it.
 * Copy the styles to the site CSS, appending the class .lightsOff before each rule.
 * Then, add this function to the site javascript:
 * Now, all you need to do is add a button/link to call the lightsOff function.