As well as the gold, Making Star Wars has also alleged that both the robe and slippers have a red lining.
At this point, it was widely assumed that Supreme Leader Snoke didn’t possess an eclectic wardrobe, and that he probably bought similarly dark attire in bulk.
Of course, they also come in gold, because they have to match his robe and he doesn’t want to look stupid.
That’s far from the case, though, because as well as the aforementioned golden robe, which makes him sound like an evil Hugh Hefner, he also possesses slippers that have been compared to those worn by genies and jesters.