Benjamin Moore At Sea (666) records 71.64% LRV and 89 L*_HK lightness (#C4E3DB, RGB 196/227/219). Its CIELAB coordinates (L*=87.87, a*=-11.71, b*=0.48, C*=11.72, h°=177.7°) place 666 in the Organic Sage Green-Grey class. Top cross-brand matches for At Sea (666) are Behr Misty Isle (MQ3-19, ΔE=0.22) and Sherwin-Williams Waterfall (SW 6750, ΔE=1.19).
Benjamin Moore At Sea (666, #C4E3DB) is compared against competitor swatches under ISO/CIE 11664-6 (ΔE2000) and ASTM E308.
| Role / Brand | Paint Color Name & Code | HEX Code | LRV % | Undertone Profile | CIE ΔE 2000 |
|---|---|---|---|---|---|
| SOURCE (Benjamin Moore) | At Sea (666) | #C4E3DB | 71.64% | Organic Sage Green-Grey | 0.00 (Ref) |
| Behr #1 | Misty Isle (MQ3-19) | #C5E4DC | 73% | Organic Sage Green-Grey | ΔE 0.22 (99.5%) |
| Behr #2 | Tidewater (M450-2) | #C2E3DD | 71% | Organic Sage Green-Grey | ΔE 0.96 (98%) |
| Sherwin-Williams #1 | Waterfall (SW 6750) | #C0E3DA | 71.05% | Organic Sage Green-Grey | ΔE 1.19 (97.5%) |
| Sherwin-Williams #2 | Tame Teal (SW 6757) | #C1E6DF | 73.07% | Organic Sage Green-Grey | ΔE 1.66 (96.5%) |
Sub-threshold ΔE=0.22 match for 666: Misty Isle (MQ3-19) delivers +1.4 LRV points lighter than At Sea (666) with matched C*=11.71 saturation.
Sub-threshold ΔE=0.96 match for 666: Tidewater (M450-2) delivers identical 71% reflectance to 666 with matched C*=11.98 saturation.
Visual ΔE=2.36 alternative to 666: Clear Aqua (P440-2) delivers +4.4 LRV points lighter than At Sea (666) with +2.56 higher C*=14.28 chroma.
Cross-room ΔE=1.19 equivalent for 666: Waterfall (SW 6750) delivers identical 71.05% reflectance to 666 with +1.47 higher C*=13.19 chroma.
Cross-room ΔE=1.66 equivalent for 666: Tame Teal (SW 6757) delivers +1.4 LRV points lighter than At Sea (666) with +1.68 higher C*=13.4 chroma.
Visual ΔE=2.83 alternative to 666: Meander Blue (SW 6484) delivers -5.2 LRV points deeper than At Sea (666) with -1.42 softer C*=10.3 chroma.
Coordinated ceiling, trim, wall, sightline, and accent pairings for At Sea (#C4E3DB, LRV 71.64%).
At Sea (666, h°=177.7°) tempers intense afternoon sunlight on Benjamin Moore walls.
Golden Teak, Pecan & Terracotta Pavers grounded by At Sea
2700K–3000K Warm LED for 666 (4000K renders #D4E0C9)
Need At Sea (666, LRV 71.64%) brighter or deeper? Adjacent Benjamin Moore fan-deck steps around #C4E3DB:
Calculate exact gallon volume for Benjamin Moore At Sea (666) accounting for standard North American door (21 sq.ft.) and window (15 sq.ft.) deductions.
Code 666 (At Sea) reflects 71.64% of incident D65 light. Measured in CAM16-UCS uniform space, Benjamin Moore At Sea (666) registers J'=89.2, a'=-12.96, and b'=-0.35 with HSL (165°, 36%, 83%) and Helmholtz-Kohlrausch perceived value 89 L*_HK. Because 666 carries a*=-11.71 red-green and b*=0.48 yellow-blue balance at chroma C*=11.72, At Sea projects a cool organic sage green-grey character across drywall and millwork.
Thermal lighting shifts Benjamin Moore 666 predictably. Under 5000K noon daylight, At Sea (666) holds its native #CDE2D2 swatch; at 4000K cool office LED, 666 adapts to #D4E0C9; at 3500K halogen, At Sea transitions to #DADFC3; at 3000K residential LED, 666 warms to #E1DDBE; and under 2700K evening bulbs, At Sea (666) settles at #E6DCBA.
When cross-matching Benjamin Moore At Sea (666, #C4E3DB), Behr Misty Isle (MQ3-19, #C5E4DC, LRV 73%) scores ΔE2000=0.22 and CAM16=0.32, followed by Tidewater (M450-2, ΔE=0.96). In Sherwin-Williams, Waterfall (SW 6750, #C0E3DA, LRV 71.05%) achieves ΔE2000=1.19 ahead of Tame Teal (SW 6757, ΔE=1.66). Coordinate 666 with Ice Mist (OC-67) ceilings, White (OC-151) trim, Warm Springs (682) hallways, and Covington Blue (HC-138) accents.
Spectrophotometric answers for homeowners, interior designers, and painting contractors specifying Benjamin Moore At Sea.
Benjamin Moore At Sea (666) records an official Light Reflectance Value of 71.64% (#C4E3DB) and a Helmholtz-Kohlrausch perceived lightness of 89 L*_HK.
At 71.64% reflectance, At Sea (666) is a mid-tone Benjamin Moore shade with enough pigment depth (L*=87.87) to hold its #C4E3DB color in bright sun.
CIELAB telemetry (L*=87.87, a*=-11.71, b*=0.48) classifies Benjamin Moore At Sea (666) as a Cool Organic Sage Green-Grey with C*=11.72 chroma and h°=177.7° hue.
Pair At Sea (666) with South & West Sun Exposure for 666 (71.64% LRV) and Golden Teak, Pecan & Terracotta Pavers grounded by At Sea. Under 2700K evening bulbs, 666 shifts from #C4E3DB toward #E6DCBA.
Closest verified equivalents to Benjamin Moore At Sea (666, #C4E3DB) are Behr Misty Isle (MQ3-19, #C5E4DC) at ΔE2000=0.22 and Sherwin-Williams Waterfall (SW 6750, #C0E3DA) at ΔE2000=1.19.
Both MQ3-19 and SW 6750 matches are verified against At Sea (666) in CIE ΔE2000 and CAM16-UCS space.
Alongside Benjamin Moore At Sea (666, LRV 71.64%), our Ou-Luo harmony engine specifies Benjamin Moore White (OC-151, #EDEEEB, LRV 85.17%) in Semi-Gloss or Satin.
Pairing White (OC-151) with At Sea (666) frames door casings and baseboards cleanly.