I (Mythjan on Emerald Ocean) created this lair design mostly in my favourite colour - red. In this case it (mostly) represents blood (especially on the floor) and danger. I designed this lair as a headquarters (HQ) of a cult of haunted souls, so "haunted" and "cursed" are main themes (both equally important).
I arranged elements in a way, that leaves as much space as possible (for members of the cult - functionality) without losing good appearance (art) - at least that was the main idea.