Crimson Slab is a magenta-red Nether wood that does not burn. As a slab it is half a block tall, for floors, roof edges, and steps. Pair it with blackstone, nether bricks, or warped wood for Nether builds, or use it as a bold accent.
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.