I can tell you a funny story about the KKK, and a true one according to my American history teacher. One year the wives of the Klan members refused to make the costumes from white sheets. So the men had to make do with bed sheets. And not all were white, but had pastels, stripes, spots and florals.
I know the history of them, and how awful they are. But I just think it's hilarious they were jumping about in bright colours and patterns. And sort of ironic if you think about it for a bit.