Mountain Air vs River Rouge

Both are Sherwin-Williams colors. Mountain Air reads as blue-grey, while River Rouge reads as grey — two distinct hue families, not close cousins. At LRV 73 vs 12, Mountain Air will read as the brighter of the two — a 61-point gap that matters most in north-facing or low-light rooms. The tonal difference — Mountain Air's cool character against River Rouge's warm — becomes most visible against white trim or in morning light. At ΔE 50.2, 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.