Iron Mountain
Behr
Try N520-5 on your wall
Take a photo of the room. Muro puts this color on the walls in the light the room actually has.
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How Iron Mountain behaves on a wall
Behr publishes a light reflectance value of 45.2 for this shade. At LRV 45.2 this sits mid-scale — dark enough to hold its own against white trim, light enough not to close a room in. Mid-tones shift the most between daylight and lamplight, so check it at both ends of the day. For trim that reads as a clear edge rather than a smudge, aim about 30 LRV points away in either direction — under LRV 15 or over LRV 75. Its blue channel runs ahead of its red, so it reads cool and will sharpen next to steel, glass and grey stone. Order by the code, not the name, and put a test patch on the wall before you commit — a screen cannot show you how this shade behaves in your own light.
Iron Mountain equivalents in other paint brands
The closest color to Behr Iron Mountain from each brand we carry, measured with CIEDE2000 on the manufacturers' published color values. Below 1 the difference is practically invisible; below 2 you'd only notice it with the chips side by side. Screens and printed chips aren't paint, so compare real samples before you buy. In the Muro app you can put two of them on a photo of your own wall and look at them in your light.