Thundering Clouds (Valspar 4005-4B)
Illustrative room. Screen colors vary; test a sample before you paint.
Thundering Clouds (Valspar 4005-4B) is a very deep, cool blue from Valspar: LRV 18, so it reflects about 18 percent of the light that hits it.
Colors that go with Thundering Clouds
Four Valspar colors picked for Thundering Clouds by this site's color math: a trim white, a deeper blue, 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 Thundering Clouds, 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 | Searching Blue | SW 6536 | 21 | 3.6 | noticeably different |
| Benjamin Moore | In the Twilight | 1434 | 21.8 | 4.4 | noticeably different |
| Behr | Always Indigo | ECC-57-3 | 17.9 | 0.4 | indistinguishable |
| PPG Paints | License To Dream | 10-22 | 17 | 1.9 | very close |
Lighter and darker in Valspar
The Valspar blue colors nearest to Thundering Clouds (LRV 18) by LRV.
Lighter than Thundering Clouds
Darker than Thundering Clouds
Color data
| Brand | Valspar |
|---|---|
| Color code | 4005-4B |
| Hex | #66778D |
| RGB | 102, 119, 141 |
| HSL | 214°, 16%, 48% |
| LRV (light reflectance value) | 18 |
| Lab L*, a*, b* | 49.4, -0.9, -14.0 |
| Undertone | Cool Blue |
| Temperature | cool |
| Color family | Blue |
Same paint, two kinds of light
Thundering Clouds (Valspar 4005-4B), published as #66778D
#536E8B
#79808D
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 Thundering Clouds (Valspar 4005-4B)?
- Thundering Clouds has an LRV of 18. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Thundering Clouds is a very deep color.
- What is the closest match to Thundering Clouds in another brand?
- Always Indigo (Behr ECC-57-3) from Behr, at a deltaE of 0.4 (indistinguishable).
- Is Thundering Clouds warm or cool?
- Valspar lists Thundering Clouds as cool, with a Cool Blue undertone. Its Lab b* value is -14.0; 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.