Iron Mountain vs Tempest
Iron Mountain (Behr) and Tempest (Benjamin Moore) come from different manufacturers. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. Their light reflectance values are nearly the same — 18 vs 20 — so neither will read significantly brighter or darker than the other. Where Iron Mountain leans yellow, Tempest reads purple — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 5.6 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Iron Mountain vs Tempest Simulated Comparison
5 simulated room previews — drag the slider on each to see Iron Mountain on one side and Tempest 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.
White Dove reflects far more light (LRV 83 vs 18), opening up a space where Iron Mountain encloses it.
At LRV 69 vs 18, Ammonite is decisively the brighter choice.
Iron Mountain reflects far more light (LRV 18 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 18, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 18, Evergreen Fog is decisively the brighter choice.
Mizzle reflects far more light (LRV 52 vs 18), opening up a space where Iron Mountain encloses it.
At LRV 60 vs 18, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 18), opening up a space where Iron Mountain encloses it.
Denim Drift reads slightly lighter (LRV 27 vs 18), a gap that shows most in low-lit rooms.
At LRV 43 vs 18, French Gray is decisively the brighter choice.
At LRV 18 vs 4, Iron Mountain is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 18), opening up a space where Iron Mountain encloses it.
Iron Mountain reads slightly lighter (LRV 18 vs 13), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 18), opening up a space where Iron Mountain encloses it.
At LRV 84 vs 18, Pure White is decisively the brighter choice.
A 4-point LRV gap (21 vs 18) makes Artichoke the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 18), opening up a space where Iron Mountain encloses it.
Shoji White reflects far more light (LRV 74 vs 18), opening up a space where Iron Mountain encloses it.
Snowbound reflects far more light (LRV 83 vs 18), opening up a space where Iron Mountain encloses it.
Iron Mountain reads slightly lighter (LRV 18 vs 12), a gap that shows most in low-lit rooms.
Skimming Stone reflects far more light (LRV 68 vs 18), opening up a space where Iron Mountain encloses it.
At LRV 41 vs 18, Dix Blue is decisively the brighter choice.
At LRV 68 vs 18, Calamine is decisively the brighter choice.
A 7-point LRV gap (25 vs 18) makes Treron the marginally brighter of the two.
Iron Mountain reads slightly lighter (LRV 18 vs 12), a gap that shows most in low-lit rooms.
Saybrook Sage reflects far more light (LRV 45 vs 18), opening up a space where Iron Mountain encloses it.
At LRV 31 vs 18, Pale Green is decisively the brighter choice.
A 11-point LRV gap (18 vs 7) makes Iron Mountain the marginally brighter of the two.
A 6-point LRV gap (24 vs 18) makes Cement grey the marginally brighter of the two.
At LRV 57 vs 18, Guilford Green is decisively the brighter choice.