Dark Eclipse

Dark Eclipse looks like a velvet bruise under low light. It's a very deep purple that leans more blue than Dark Soul, but it doesn't carry the crisp "edge" of Fibonacci Blue. Compared with Fly-by-Night, it feels heavier and less airy, closer to a shaded surface than a dark tint that still tries to read as purple.

I treat it as a deep base for UI where you need purple identity without any of that loud midtone lift. It's great for analytics and fintech: dense tables, selection bands, modal headers, and inactive-but-not-dead states on dark gray. In healthcare software it works for secondary containers and status shells when you want the one you reach for to feel controlled, not clinical.

One quirk: next to cooler grays it stays clean, but with warmer creams it can start to look flat, like the purple loses its depth. Pair it with slightly cooler neutrals and keep saturation modest.