Color spec
| Brand | Dunn-Edwards |
| Name | Iron Mountain |
| SKU | DET637 |
| Hex | #5C5C5A |
| RGB | 92, 92, 90 |
| HSL | 60°, 1%, 36% |
| LRV | 11 |
| Undertone | neutral with no strong undertone |
| Family | Gray |
About Dunn-Edwards Iron Mountain
With an LRV of 11, Iron Mountain is a deep, dramatic shade. It soaks up light in north-facing rooms and looks richest where strong daylight hits it. Because it carries almost no measurable hue, it stays a true neutral and pairs cleanly with nearly any trim or floor. Warm artificial light softens it; cool LED can make it look flat, so match your bulbs to the mood you want.
Iron Mountain works best as a feature — a single wall, built-ins, a study or dining room — rather than wrapping a whole bright space. Grays like this read as a modern neutral and sit comfortably alongside both warm woods and cool metals.
Closest matches by brand
16 brands within ΔE 5The closest matches per brand by ΔE2000, computed against each brand's full deck. Only colors within ΔE 5 (close enough to substitute on a wall) are shown — brands with no real match are left off. Tap any swatch for its full single-color spec; tap the brand title to browse all gray from that brand.
Sherwin-Williams
Behr
Benjamin Moore
Valspar
PPG / Glidden
Glidden
Dutch Boy
HGTV Home by Sherwin-Williams
Magnolia Home
Farrow & Ball
Diamond Vogel
Hirshfield's
Rodda
C2 Paint
Clare
Kompozit
Similar Dunn-Edwards colors
closest in the Dunn-Edwards deckThe nearest shades to Iron Mountain within Dunn-Edwards's own range, ranked by perceptual color distance — useful when you want the same look a touch lighter, darker, or warmer.
Coordinated palette
Generated by hue-rotating #5C5C5A in HSL space. Pair Iron Mountain with one accent and one neutral — the swatches below are starting points, not final picks.
Accessibility (WCAG contrast)
WCAG 2.1: AA = 4.5:1 normal text · AA Large = 3:1 large text · AAA = 7:1 normal text.
Dunn-Edwards Iron Mountain Equivalents at Other Brands
Matching Iron Mountain from a different paint counter? Below is the single closest color in each major US deck and how close it really is. Remember that any paint store can also custom-tint Dunn-Edwards DET637 directly — these equivalents are for when you'd rather stay inside one brand's own deck.
Sherwin-Williams Equivalent of Iron Mountain
The closest Sherwin-Williams equivalent of Iron Mountain is Forged Steel (SW 9565). At ΔE 0.36 the two are indistinguishable on a wall — it carries the same true neutral undertone and sits at the same lightness (LRV 10 vs 11). If Sherwin-Williams is your counter, order Forged Steel and you'll get the same color. See the full Forged Steel swatch →
Behr Equivalent of Iron Mountain
Behr's nearest match is Wright Brown (N140-6), visually identical in normal room light (ΔE 1.22). It sits at the same lightness (LRV 11 vs 11) and carries a true neutral undertone, so it substitutes for Iron Mountain without repainting risk. See the full Wright Brown swatch →
Benjamin Moore Equivalent of Iron Mountain
Benjamin Moore has no exact twin of Iron Mountain. The nearest is Flint (AF-560) at ΔE 3.62 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 12 vs 11). Compare large swatches before substituting. See the full Flint swatch →
Valspar Equivalent of Iron Mountain
Valspar has no exact twin of Iron Mountain. The nearest is Wetlands (5007-2C) at ΔE 4.32 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 10.9 vs 11). Compare large swatches before substituting. See the full Wetlands swatch →
PPG / Glidden Equivalent of Iron Mountain
At PPG / Glidden, the closest color to Iron Mountain is Zombie (PPG1010-7) — very close at ΔE 2.02, though not an exact twin. It sits at the same lightness (LRV 10 vs 11) and carries a true neutral undertone; sample both side by side if the room gets strong natural light. See the full Zombie swatch →
Glidden Equivalent of Iron Mountain
The closest Glidden equivalent of Iron Mountain is Summer Shadow (PPG0996-7). At ΔE 0.98 the two are indistinguishable on a wall — it carries the same true neutral undertone and sits at the same lightness (LRV 11 vs 11). If Glidden is your counter, order Summer Shadow and you'll get the same color. See the full Summer Shadow swatch →
Dutch Boy Equivalent of Iron Mountain
Dutch Boy's nearest match is Ship's Anchor (437-6DB), visually identical in normal room light (ΔE 1.88). It sits at the same lightness (LRV 10 vs 11) and carries a true neutral undertone, so it substitutes for Iron Mountain without repainting risk. See the full Ship's Anchor swatch →
HGTV Home by Sherwin-Williams Equivalent of Iron Mountain
HGTV Home by Sherwin-Williams's nearest match is Peppercorn (HGSW 1491), visually identical in normal room light (ΔE 1.88). It sits at the same lightness (LRV 10 vs 11) and carries a true neutral undertone, so it substitutes for Iron Mountain without repainting risk. See the full Peppercorn swatch →
Magnolia Home Equivalent of Iron Mountain
Magnolia Home has no exact twin of Iron Mountain. The nearest is Rocking Horse (JG-121) at ΔE 3.9 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 11 vs 11). Compare large swatches before substituting. See the full Rocking Horse swatch →
Diamond Vogel Equivalent of Iron Mountain
Diamond Vogel has no exact twin of Iron Mountain. The nearest is Telfor Tower (H097) at ΔE 3.97 — close, but the difference shows next to trim and in side light. It sits at the same lightness (LRV 10 vs 11). Compare large swatches before substituting. See the full Telfor Tower swatch →
Hirshfield's Equivalent of Iron Mountain
Hirshfield's's nearest match is Zen Retreat (0535), visually identical in normal room light (ΔE 1.21). It runs slightly lighter (LRV 13 vs 11) and carries a true neutral undertone, so it substitutes for Iron Mountain without repainting risk. See the full Zen Retreat swatch →
Rodda Equivalent of Iron Mountain
At Rodda, the closest color to Iron Mountain is Space Dive (R023) — very close at ΔE 2.18, though not an exact twin. It sits at the same lightness (LRV 11 vs 11) and carries a true neutral undertone; sample both side by side if the room gets strong natural light. See the full Space Dive swatch →
C2 Paint Equivalent of Iron Mountain
At C2 Paint, the closest color to Iron Mountain is Jabberwocky (C2-885) — very close at ΔE 2.14, though not an exact twin. It sits at the same lightness (LRV 10 vs 11) and carries a true neutral undertone; sample both side by side if the room gets strong natural light. See the full Jabberwocky swatch →
Kompozit Equivalent of Iron Mountain
Kompozit's nearest match is Zen Retreat (0535), visually identical in normal room light (ΔE 1.21). It sits at the same lightness (LRV 11 vs 11) and carries a true neutral undertone, so it substitutes for Iron Mountain without repainting risk. See the full Zen Retreat swatch →