Dark prismarine, stairs or slab and prismarine, stairs or slab have wrong color on maps

The bug

Dark prismarine, stairs or slab and prismarine, stairs or slab have wrong color on maps(the two color should be interchanged).
Dark prismarine, stairs or slab shows up as color like prismarine bricks on maps, the correct color should like warped planks.
Prismarine, stairs or slab shows up as color like warped planks on maps, the correct color should like prismarine bricks.

Code analysis

[Mod] Avoma has done a code analysis in this comment.