The site’s color scheme is rather garish, isn’t it?
Yep. OK, fine, I’ll elaborate on the color scheme. For a long time now I’ve associated purple with “dark energy”, entropy, and death … something I picked up from the term “blacklight” and the actual appearance of such a light. By extension, in the comic it represents night time, the gloaming, and so forth. Cities are artifacts of the daylight world, as that is when normal humans are active. The most obvious associations for daytime are sunlight and green, growing things (which also signifies Life). This is why city scenes are predominantly lit green at night in the setting.