Rookwood Medium Brown vs Umber Rust

Both from Sherwin-Williams's palette. Hue-wise, Rookwood Medium Brown belongs to the beige-greige family and Umber Rust to the beige family. They have nearly identical light reflectance values (10 vs 10), so they'll read as similarly Dark in most lighting conditions. Both lean warm, so they'll behave similarly in mixed or changing light conditions. The ΔE 7.1 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.