Iron Mountain vs Before the Storm
Where Iron Mountain belongs to Behr's range, Before the Storm is a Sherwin-Williams color. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. They have nearly identical light reflectance values (18 vs 18), so they'll read as similarly Dark in most lighting conditions. Iron Mountain runs yellow while Before the Storm is decidedly neutral, which means they'll respond very differently to warm vs cool light sources. At ΔE 2.7, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Iron Mountain vs Before the Storm in Real Spaces
1 real room side by side. Iron Mountain and Before the Storm are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Living Room
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
Iron Mountain vs Before the Storm Simulated Comparison
5 simulated room previews — drag the slider on each to see Iron Mountain on one side and Before the Storm on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Iron Mountain comparisons
See how Iron Mountain stacks up against other well-photographed colors across different brands and tones.
