Sherwin-Williams Open Air (SW 6491) records 70.13% LRV and 87.9 L*_HK lightness (#C7DFE0, RGB 199/223/224). Its CIELAB coordinates (L*=87.14, a*=-7.73, b*=-3.19, C*=8.36, h°=202.4°) place SW 6491 in the Cool Coastal Blue-Grey class. Top cross-brand matches for Open Air (SW 6491) are Behr Beach Foam (S450-1, ΔE=1.73) and Benjamin Moore Glacier Blue (1653, ΔE=1.76).
Sherwin-Williams Open Air (SW 6491, #C7DFE0) 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 (Sherwin-Williams) | Open Air (SW 6491) | #C7DFE0 | 70.13% | Cool Coastal Blue-Grey | 0.00 (Ref) |
| Behr #1 | Beach Foam (S450-1) | #CDE0E1 | 72% | Cool Coastal Blue-Grey | ΔE 1.73 (96.4%) |
| Behr #2 | Sunken Pool (S440-1) | #C8DDDA | 69% | Organic Sage Green-Grey | ΔE 1.97 (95.9%) |
| Benjamin Moore #1 | Glacier Blue (1653) | #C8DEE2 | 69.83% | Cool Coastal Blue-Grey | ΔE 1.76 (96.3%) |
| Benjamin Moore #2 | Bird'S Egg (2051-60) | #BEDCDD | 67.15% | Cool Coastal Blue-Grey | ΔE 2.06 (95.7%) |
Cross-room ΔE=1.73 equivalent for SW 6491: Beach Foam (S450-1) delivers +1.9 LRV points lighter than Open Air (SW 6491) with -1.7 softer C*=6.66 chroma.
Cross-room ΔE=1.97 equivalent for SW 6491: Sunken Pool (S440-1) delivers -1.1 LRV points deeper than Open Air (SW 6491) with -0.75 softer C*=7.61 chroma.
Visual ΔE=2.23 alternative to SW 6491: Ethereal Mood (MQ3-52) delivers +5.9 LRV points lighter than Open Air (SW 6491) with +1.08 higher C*=9.44 chroma.
Cross-room ΔE=1.76 equivalent for SW 6491: Glacier Blue (1653) delivers identical 69.83% reflectance to SW 6491 with matched C*=7.87 saturation.
Visual ΔE=2.06 alternative to SW 6491: Bird'S Egg (2051-60) delivers -3 LRV points deeper than Open Air (SW 6491) with +2.03 higher C*=10.39 chroma.
Visual ΔE=2.35 alternative to SW 6491: Crystal Springs (764) delivers +4.4 LRV points lighter than Open Air (SW 6491) with +2.06 higher C*=10.42 chroma.
Coordinated ceiling, trim, wall, sightline, and accent pairings for Open Air (#C7DFE0, LRV 70.13%).
Open Air (SW 6491, h°=202.4°) tempers intense afternoon sunlight on Sherwin-Williams walls.
Golden Teak, Pecan & Terracotta Pavers grounded by Open Air
2700K–3000K Warm LED for SW 6491 (4000K renders #D7DCCE)
Need Open Air (SW 6491, LRV 70.13%) brighter or deeper? Adjacent Sherwin-Williams fan-deck steps around #C7DFE0:
Calculate exact gallon volume for Sherwin-Williams Open Air (SW 6491) accounting for standard North American door (21 sq.ft.) and window (15 sq.ft.) deductions.
Code SW 6491 (Open Air) reflects 70.13% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Open Air (SW 6491) registers J'=88.7, a'=-10.22, and b'=-3.86 with HSL (182°, 29%, 83%) and Helmholtz-Kohlrausch perceived value 87.9 L*_HK. Because SW 6491 carries a*=-7.73 red-green and b*=-3.19 yellow-blue balance at chroma C*=8.36, Open Air projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 6491 predictably. Under 5000K noon daylight, Open Air (SW 6491) holds its native #CFDED7 swatch; at 4000K cool office LED, SW 6491 adapts to #D7DCCE; at 3500K halogen, Open Air transitions to #DDDBC7; at 3000K residential LED, SW 6491 warms to #E3D9C2; and under 2700K evening bulbs, Open Air (SW 6491) settles at #E8D8BE.
When cross-matching Sherwin-Williams Open Air (SW 6491, #C7DFE0), Behr Beach Foam (S450-1, #CDE0E1, LRV 72%) scores ΔE2000=1.73 and CAM16=1.77, followed by Sunken Pool (S440-1, ΔE=1.97). In Benjamin Moore, Glacier Blue (1653, #C8DEE2, LRV 69.83%) achieves ΔE2000=1.76 ahead of Bird'S Egg (2051-60, ΔE=2.06). Coordinate SW 6491 with High Reflective White (SW 7757) ceilings, Ibis White (SW 7000) trim, Rain (SW 6219) hallways, and Aqua‐Sphere (SW 7613) accents.
Spectrophotometric answers for homeowners, interior designers, and painting contractors specifying Sherwin-Williams Open Air.
Sherwin-Williams Open Air (SW 6491) records an official Light Reflectance Value of 70.13% (#C7DFE0) and a Helmholtz-Kohlrausch perceived lightness of 87.9 L*_HK.
At 70.13% reflectance, Open Air (SW 6491) is a mid-tone Sherwin-Williams shade with enough pigment depth (L*=87.14) to hold its #C7DFE0 color in bright sun.
CIELAB telemetry (L*=87.14, a*=-7.73, b*=-3.19) classifies Sherwin-Williams Open Air (SW 6491) as a Cool Cool Coastal Blue-Grey with C*=8.36 chroma and h°=202.4° hue.
Pair Open Air (SW 6491) with South & West Sun Exposure for SW 6491 (70.13% LRV) and Golden Teak, Pecan & Terracotta Pavers grounded by Open Air. Under 2700K evening bulbs, SW 6491 shifts from #C7DFE0 toward #E8D8BE.
Closest verified equivalents to Sherwin-Williams Open Air (SW 6491, #C7DFE0) are Behr Beach Foam (S450-1, #CDE0E1) at ΔE2000=1.73 and Benjamin Moore Glacier Blue (1653, #C8DEE2) at ΔE2000=1.76.
Both S450-1 and 1653 matches are verified against Open Air (SW 6491) in CIE ΔE2000 and CAM16-UCS space.
Alongside Sherwin-Williams Open Air (SW 6491, LRV 70.13%), our Ou-Luo harmony engine specifies Sherwin-Williams Ibis White (SW 7000, #F2ECE6, LRV 84.68%) in Semi-Gloss or Satin.
Pairing Ibis White (SW 7000) with Open Air (SW 6491) frames door casings and baseboards cleanly.