Optimum Blue (Behr M540-7)
Illustrative room. Screen colors vary; test a sample before you paint.
Optimum Blue (Behr M540-7) is a very deep, cool blue from Behr: LRV 10.1, so it reflects about 10 percent of the light that hits it.
Colors that go with Optimum Blue
Three Behr colors picked for Optimum 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 Optimum 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 | Luxe Blue | SW 6537 | 13 | 4.6 | noticeably different |
| Benjamin Moore | Indi Go-Go | CSP-565 | 11.4 | 3.3 | noticeably different |
| Valspar | Precious Sapphire | 4010-7 | 10 | 0.5 | indistinguishable |
| PPG Paints | Blue Jewel | 1167-7 | 9 | 3.6 | noticeably different |
Lighter and darker in Behr
The Behr blue colors nearest to Optimum Blue (LRV 10.1 (estimated)) by LRV.
Lighter than Optimum Blue
Darker than Optimum Blue
Color data
| Brand | Behr |
|---|---|
| Color code | M540-7 |
| Hex | #465A7F |
| RGB | 70, 90, 127 |
| HSL | 219°, 29%, 39% |
| LRV (light reflectance value) | 10.1 (estimated from the hex) |
| Lab L*, a*, b* | 38.1, 2.9, -23.2 |
| Undertone | Cool Blue |
| Temperature | cool |
| Color family | Blue |
Same paint, two kinds of light
Optimum Blue (Behr M540-7), published as #465A7F
#2F527D
#5A637F
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 Optimum Blue (Behr M540-7)?
- Optimum Blue has an LRV of 10.1 (estimated from its hex value). LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Optimum Blue is a very deep color.
- What is the closest match to Optimum Blue in another brand?
- Precious Sapphire (Valspar 4010-7) from Valspar, at a deltaE of 0.5 (indistinguishable).
- Is Optimum Blue warm or cool?
- Behr lists Optimum Blue as cool, with a Cool Blue undertone. Its Lab b* value is -23.2; 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.