Charcoal Blue (SW 2739)
Illustrative room. Screen colors vary; test a sample before you paint.
Charcoal Blue (SW 2739) is a very deep, cool black from Sherwin-Williams: LRV 6, so it reflects about 6 percent of the light that hits it.
Colors that go with Charcoal Blue
Three Sherwin-Williams colors picked for Charcoal Blue by this site's color math: a trim white, a quiet contrast from another family, a dark accent. Sherwin-Williams did not choose these pairings.
Closest match in every other brand
Each brand's closest color to Charcoal Blue, 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.
Lighter and darker in Sherwin-Williams
The Sherwin-Williams black colors nearest to Charcoal Blue (LRV 6) by LRV.
Darker than Charcoal Blue
Color data
| Brand | Sherwin-Williams |
|---|---|
| Color code | SW 2739 |
| Hex | #3D4450 |
| RGB | 61, 68, 80 |
| HSL | 218°, 13%, 28% |
| LRV (light reflectance value) | 6 |
| Lab L*, a*, b* | 28.7, 0.2, -8.1 |
| Undertone | Cool |
| Temperature | cool |
| Color family | Black |
Same paint, two kinds of light
Charcoal Blue (SW 2739), published as #3D4450
#2C3C4E
#4D4C50
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Similar shades from Sherwin-Williams
More from Sherwin-Williams
Common questions
- What is the LRV of Charcoal Blue (SW 2739)?
- Charcoal Blue has an LRV of 6. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Charcoal Blue is a very deep color.
- What is the closest match to Charcoal Blue in another brand?
- Stiletto (Behr T11-2) from Behr, at a deltaE of 1.5 (very close).
- Is Charcoal Blue warm or cool?
- Sherwin-Williams lists Charcoal Blue as cool, with a Cool undertone. Its Lab b* value is -8.1; 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.