Constellation Blue (Behr T18-18)
Illustrative room. Screen colors vary; test a sample before you paint.
Constellation Blue (Behr T18-18) is a very deep, cool purple from Behr: LRV 6.5, so it reflects about 7 percent of the light that hits it.
Colors that go with Constellation Blue
Three Behr colors picked for Constellation Blue by this site's color math: a trim white, a quiet contrast from another family, a dark accent. Behr did not choose these pairings.
Closest match in every other brand
Each brand's closest color to Constellation 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 | Valiant Violet | SW 6818 | 6 | 1.8 | very close |
| Benjamin Moore | Wizard | CC-966 | 8.4 | 1.5 | very close |
| Valspar | Homecoming Blue | 4009-9 | 8 | 4.1 | noticeably different |
| PPG Paints | Egyptian Violet | 1168-7 | 7 | 1.9 | very close |
Lighter and darker in Behr
The Behr purple colors nearest to Constellation Blue (LRV 6.5 (estimated)) by LRV.
Lighter than Constellation Blue
Darker than Constellation Blue
Color data
| Brand | Behr |
|---|---|
| Color code | T18-18 |
| Hex | #3C4670 |
| RGB | 60, 70, 112 |
| HSL | 228°, 30%, 34% |
| LRV (light reflectance value) | 6.5 (estimated from the hex) |
| Lab L*, a*, b* | 30.7, 8.2, -25.5 |
| Undertone | Cool Blue |
| Temperature | cool |
| Color family | Purple |
Same paint, two kinds of light
Constellation Blue (Behr T18-18), published as #3C4670
#263E6E
#504E71
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Similar shades from Behr
More from Behr
Common questions
- What is the LRV of Constellation Blue (Behr T18-18)?
- Constellation Blue has an LRV of 6.5 (estimated from its hex value). LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Constellation Blue is a very deep color.
- What is the closest match to Constellation Blue in another brand?
- Wizard (BM CC-966) from Benjamin Moore, at a deltaE of 1.5 (very close).
- Is Constellation Blue warm or cool?
- Behr lists Constellation Blue as cool, with a Cool Blue undertone. Its Lab b* value is -25.5; a higher b* is warmer and yellower, a lower one cooler and bluer.
Sources: hex as published by the manufacturer, via PaintDB (CC BY 4.0); LRV is not published by Behr for this color and is estimated here from the color's own hex value. 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.