Continuing the discussion from Coming soon to Meta DARKNESS :
No, that was a mockup of a per-user theme selector, located under preferences (in fact, the mockup was based off of a “custom field” on a VM that I installed discourse on a while back). I still think that a built-in per-user theme would be better than installing an extension (+ the user doesn’t have to know how to write CSS).
BTW, when I quoted my post, discourse didn’t automatically copy images.