Mountain Air vs Sleepy Blue

Both from Sherwin-Williams's palette. Hue-wise, Mountain Air belongs to the blue-grey family and Sleepy Blue to the blue family. Mountain Air (LRV 73) reflects noticeably more light than Sleepy Blue (LRV 58), a difference of 15 points that becomes especially apparent in rooms with limited natural light. Both lean cool, so they'll behave similarly in mixed or changing light conditions. The ΔE 8.5 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.