Harbor Side Blue (BM 740)
Illustrative room. Screen colors vary; test a sample before you paint.
Harbor Side Blue (BM 740) is a medium, cool blue from Benjamin Moore: LRV 40.3, so it reflects about 40 percent of the light that hits it.
Colors that go with Harbor Side Blue
Four Benjamin Moore colors picked for Harbor Side Blue by this site's color math: a trim white, a deeper blue, a quiet contrast from another family, a dark accent. Benjamin Moore did not choose these pairings.
Closest match in every other brand
Each brand's closest color to Harbor Side 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 | Mariner | SW 6766 | 46 | 3.8 | noticeably different |
| Behr | Surfer | 510D-5 | 41.3 | 2.4 | noticeably different |
| Valspar | Rushing Stream | 5005-10B | 37 | 2.0 | very close |
| PPG Paints | Biscay Bay | 1234-5 | 37 | 2.3 | noticeably different |
Lighter and darker in Benjamin Moore
The Benjamin Moore blue colors nearest to Harbor Side Blue (LRV 40.3) by LRV.
Lighter than Harbor Side Blue
Darker than Harbor Side Blue
Color data
| Brand | Benjamin Moore |
|---|---|
| Color code | 740 |
| Hex | #5CB5B9 |
| RGB | 92, 181, 185 |
| HSL | 183°, 40%, 54% |
| LRV (light reflectance value) | 40.3 |
| Lab L*, a*, b* | 68.6, -25.5, -10.2 |
| Undertone | Cool Blue |
| Temperature | cool |
| Color family | Blue |
Same paint, two kinds of light
Harbor Side Blue (BM 740), published as #5CB5B9
#3FABB7
#75BFB9
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Similar shades from Benjamin Moore
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Common questions
- What is the LRV of Harbor Side Blue (BM 740)?
- Harbor Side Blue has an LRV of 40.3. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Harbor Side Blue is a medium color.
- What is the closest match to Harbor Side Blue in another brand?
- Rushing Stream (Valspar 5005-10B) from Valspar, at a deltaE of 2.0 (very close).
- Is Harbor Side Blue warm or cool?
- Benjamin Moore lists Harbor Side Blue as cool, with a Cool Blue undertone. Its Lab b* value is -10.2; 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.