Boisterous Blue (Valspar 4009-6)
Illustrative room. Screen colors vary; test a sample before you paint.
Boisterous Blue (Valspar 4009-6) is a very deep, cool blue from Valspar: LRV 8, so it reflects about 8 percent of the light that hits it.
Colors that go with Boisterous Blue
Three Valspar colors picked for Boisterous Blue by this site's color math: a trim white, a quiet contrast from another family, a dark accent. Valspar did not choose these pairings.
Closest match in every other brand
Each brand's closest color to Boisterous 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.
| Brand | Closest color | Code | LRV | deltaE | How close |
|---|---|---|---|---|---|
| Sherwin-Williams | Endless Sea | SW 9150 | 9 | 2.9 | noticeably different |
| Benjamin Moore | Summer Nights | 777 | 10.8 | 2.7 | noticeably different |
| Behr | Twilight Chimes | 560F-7 | 8.1 | 2.0 | very close |
| PPG Paints | Regatta Bay | 1154-7 | 8 | 2.4 | noticeably different |
Lighter and darker in Valspar
The Valspar blue colors nearest to Boisterous Blue (LRV 8) by LRV.
Lighter than Boisterous Blue
Darker than Boisterous Blue
Color data
| Brand | Valspar |
|---|---|
| Color code | 4009-6 |
| Hex | #375264 |
| RGB | 55, 82, 100 |
| HSL | 204°, 29%, 30% |
| LRV (light reflectance value) | 8 |
| Lab L*, a*, b* | 33.5, -4.8, -13.6 |
| Undertone | Cool Blue |
| Temperature | cool |
| Color family | Blue |
Same paint, two kinds of light
Boisterous Blue (Valspar 4009-6), published as #375264
#214A62
#4A5B64
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Similar shades from Valspar
More from Valspar
Common questions
- What is the LRV of Boisterous Blue (Valspar 4009-6)?
- Boisterous Blue has an LRV of 8. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Boisterous Blue is a very deep color.
- What is the closest match to Boisterous Blue in another brand?
- Twilight Chimes (Behr 560F-7) from Behr, at a deltaE of 2.0 (very close).
- Is Boisterous Blue warm or cool?
- Valspar lists Boisterous Blue as cool, with a Cool Blue undertone. Its Lab b* value is -13.6; 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.