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Portsmouth SW 9644
On-screen approximation from the published RGB value. Order a physical sample before you decide.
Undertone: Subtle blue-green undertone
In CIELAB, Portsmouth sits at L* 54.0, a* -5.5, b* -0.7. Its hue angle is 187° and its chroma is 5.6, so it leans blue-green only slightly — the undertone mostly shows next to whiter or grayer colors. It classifies as cool. Among Sherwin-Williams colors with a similar LRV (±5), it is warmer (more yellow) than 22%.
LRV 21.9: dark
Light Reflectance Value runs from 0 (absolute black) to 100 (perfect white). At 21.9, Portsmouth is lighter than 29% of Sherwin-Williams colors. Absorbs most light. Good for accent walls, cabinets, doors and exteriors; needs good lighting indoors.
Closest Benjamin Moore match to Portsmouth
Ranked by CIEDE2000 color difference (ΔE) computed from published RGB values. Below 2 is hard to tell apart on the wall; above 4 is a different color.
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Apollo Blue | CW-645 | 0.55 | Practically identical | |
| Templeton Gray | HC-161 | 1.30 | Very close | |
| Night Train | 1567 | 2.12 | Close — difference visible side by side |
Closest Behr match to Portsmouth
Ranked by CIEDE2000 color difference (ΔE) computed from published RGB values. Below 2 is hard to tell apart on the wall; above 4 is a different color. Behr does not publish LRV, so Behr values here are estimates.
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Juniper Ash | PPU12-16 | 1.80 | Very close | |
| Nature Retreat | 730F-5 | 2.02 | Close — difference visible side by side | |
| Coney Island | N440-5 | 2.77 | Close — difference visible side by side |
Similar Sherwin-Williams colors
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Taiga | SW 9654 | 3.58 | Close — difference visible side by side | |
| Studio Blue Green | SW 0047 | 3.72 | Close — difference visible side by side | |
| Underseas | SW 6214 | 4.48 | Similar, clearly different | |
| Foggy Day | SW 6235 | 4.51 | Similar, clearly different | |
| Scattered Showers | SW 9559 | 4.73 | Similar, clearly different | |
| Retreat | SW 6207 | 5.07 | Similar, clearly different |
Lighter and darker versions
Colors from Sherwin-Williams with nearly the same hue and saturation, one step lighter or darker.
- Classic French Gray SW 0077 · lighter, LRV 24.2
- Underseas SW 6214 · lighter, LRV 25.4
- Moody Blue SW 6221 · lighter, LRV 26.5
- Foggy Day SW 6235 · darker, LRV 19.5
- Teal Stencil SW 0018 · darker, LRV 19.2
- Westchester Gray SW 2849 · darker, LRV 19.2
Colors that go with Portsmouth
Color-theory pairings — the nearest Sherwin-Williams color to each rotated hue, keeping the same lightness and saturation:
- Enigma SW 6018 · complementary (180°)
- Taiga SW 9654 · analogous (−30°)
- Blustery Sky SW 9140 · analogous (+30°)
- Special Gray SW 6277 · triadic (120°)
- Spalding Gray SW 6074 · triadic (240°)
Portsmouth vs popular colors
- Aegean Teal (Benjamin Moore 2136-40, ΔE 4.3) is lighter (LRV 25.1 vs 21.9), more blue/cool, more green, more saturated.
- Amherst Gray (Benjamin Moore HC-167, ΔE 7.6) is darker (LRV 18.8 vs 21.9), more yellow/warm, more red/pink, more muted.
- Evergreen Fog (Sherwin-Williams SW 9130, ΔE 10.0) is lighter (LRV 30.4 vs 21.9), more yellow/warm, more red/pink.