Thundercloud Gray (BM 2124-40)
Illustrative room. Screen colors vary; test a sample before you paint.
Thundercloud Gray (BM 2124-40) is a medium, neutral gray from Benjamin Moore: LRV 50.2, so it reflects about 50 percent of the light that hits it.
Colors that go with Thundercloud Gray
Four Benjamin Moore colors picked for Thundercloud 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 Thundercloud 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 | Lazy Gray | SW 6254 | 53 | 1.5 | very close |
| Behr | Skyline Steel | 750E-3 | 52 | 1.2 | very close |
| Valspar | Voyage | 4006-1B | 49 | 1.1 | very close |
| PPG Paints | Gray Frost | 1012-4 | 51 | 1.0 | very close |
Lighter and darker in Benjamin Moore
The Benjamin Moore gray colors nearest to Thundercloud Gray (LRV 50.2) by LRV.
Lighter than Thundercloud Gray
Darker than Thundercloud Gray
Color data
| Brand | Benjamin Moore |
|---|---|
| Color code | 2124-40 |
| Hex | #B8BDC0 |
| RGB | 184, 189, 192 |
| HSL | 202°, 6%, 74% |
| LRV (light reflectance value) | 50.2 |
| Lab L*, a*, b* | 76.3, -1.2, -2.1 |
| Undertone | Neutral |
| Temperature | neutral |
| Color family | Gray |
Same paint, two kinds of light
Thundercloud Gray (BM 2124-40), published as #B8BDC0
#A6B3BE
#CAC7C0
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Similar shades from Benjamin Moore
More from Benjamin Moore
Common questions
- What is the LRV of Thundercloud Gray (BM 2124-40)?
- Thundercloud Gray has an LRV of 50.2. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Thundercloud Gray is a medium color.
- What is the closest match to Thundercloud Gray in another brand?
- Gray Frost (PPG 1012-4) from PPG Paints, at a deltaE of 1.0 (very close).
- Is Thundercloud Gray warm or cool?
- Benjamin Moore lists Thundercloud Gray as neutral, with a Neutral undertone. Its Lab b* value is -2.1; 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.