Dark Prismarine Slab is a blue-green ocean monument block for underwater and coastal builds. As a slab it is half a block tall, for floors, roof edges, and steps. Pair it with dark prismarine and sea lanterns, or with sand and gold for an Atlantis feel.
Blocks to try around it, picked by color and surface detail. These are suggestions, not rules.
Ranked by the average color of each block's texture. A close color is a starting point for a palette, not a rule.