A blend: darkened midtones (which doesn't really matter), then both a cooling filter and a sepia filter. The combination gave the image more of a moonlit appearance, in my opinion. I used a similar combination here as well: [link] .
I don't know how Purism applies to other graphic formats...but in photography pure is what separates snapshot from photograph. Straight out of the box will always be just a snap. The art comes in with using the "tools" to express what it was that you felt, not just saw.