Mountain Air vs Topsail

Mountain Air and Topsail come from the same Sherwin-Williams collection. Hue-wise, Mountain Air belongs to the blue-grey family and Topsail to the blue-green family. Their light reflectance values are nearly the same — 73 vs 75 — so neither will read significantly brighter or darker than the other. Both share a cool character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 0.9 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.