Smoke Gray (BM 2120-40)
Illustrative room. Screen colors vary; test a sample before you paint.
Smoke Gray (BM 2120-40) is a deep, neutral gray from Benjamin Moore: LRV 21.1, so it reflects about 21 percent of the light that hits it.
Colors that go with Smoke Gray
Four Benjamin Moore colors picked for Smoke Gray by this site's color math: a trim white, a deeper gray, a quiet contrast from another family, a dark accent. Benjamin Moore did not choose these pairings.
Closest match in every other brand
Each brand's closest color to Smoke Gray, ranked by CIEDE2000 (deltaE): under 1.0 is indistinguishable, 1.0 to 2.3 very close, 2.3 to 5 noticeably different, over 5 clearly different.
| Brand | Closest color | Code | LRV | deltaE | How close |
|---|---|---|---|---|---|
| Sherwin-Williams | Downing Slate | SW 2819 | 21 | 1.7 | very close |
| Behr | Liquid Mercury | N510-5 | 19.3 | 0.7 | indistinguishable |
| Valspar | Iron Frost | 4007-2B | 19 | 1.4 | very close |
| PPG Paints | Favorite Flannel | 10-19 | 18 | 1.7 | very close |
Lighter and darker in Benjamin Moore
The Benjamin Moore gray colors nearest to Smoke Gray (LRV 21.1) by LRV.
Lighter than Smoke Gray
Darker than Smoke Gray
Color data
| Brand | Benjamin Moore |
|---|---|
| Color code | 2120-40 |
| Hex | #757B82 |
| RGB | 117, 123, 130 |
| HSL | 212°, 5%, 48% |
| LRV (light reflectance value) | 21.1 |
| Lab L*, a*, b* | 51.3, -0.7, -4.6 |
| Undertone | Cool |
| Temperature | neutral |
| Color family | Gray |
Same paint, two kinds of light
Smoke Gray (BM 2120-40), published as #757B82
#647280
#868482
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
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Common questions
- What is the LRV of Smoke Gray (BM 2120-40)?
- Smoke Gray has an LRV of 21.1. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Smoke Gray is a deep color.
- What is the closest match to Smoke Gray in another brand?
- Liquid Mercury (Behr N510-5) from Behr, at a deltaE of 0.7 (indistinguishable).
- Is Smoke Gray warm or cool?
- Benjamin Moore lists Smoke Gray as neutral, with a Cool undertone. Its Lab b* value is -4.6; a higher b* is warmer and yellower, a lower one cooler and bluer.
Sources: LRV and hex as published by the manufacturer, via PaintDB (CC BY 4.0). Color differences are CIEDE2000 values computed by this site from the hex values (data snapshot 2026-10-01). Color names and codes belong to their manufacturers.