Coastline vs Mortar

Both are Benjamin Moore colors. Hue-wise, Coastline belongs to the blue-grey family and Mortar to the beige-greige family. At LRV 34 vs 23, Coastline will read as the brighter of the two — a 11-point gap that matters most in north-facing or low-light rooms. The tonal difference — Coastline's blue character against Mortar's red — becomes most visible against white trim or in morning light. At ΔE 23.7, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.