Behr Bellflower Blue (M540-1) records 81% LRV and 92.4 L*_HK lightness (#E1E9EF, RGB 225/233/239). Its CIELAB coordinates (L*=91.92, a*=-1.55, b*=-3.83, C*=4.13, h°=248°) place M540-1 in the Cool Coastal Blue-Grey class. Top cross-brand matches for Bellflower Blue (M540-1) are Benjamin Moore Lily White (2128-70, ΔE=1.93) and Sherwin-Williams Rarified Air (SW 6525, ΔE=3.03).
Behr Bellflower Blue (M540-1, #E1E9EF) 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 (Behr) | Bellflower Blue (M540-1) | #E1E9EF | 81% | Cool Coastal Blue-Grey | 0.00 (Ref) |
| Benjamin Moore #1 | Lily White (2128-70) | #E3E9EB | 80.54% | Cool Coastal Blue-Grey | ΔE 1.93 (95.9%) |
| Benjamin Moore #2 | Seattle Gray (2130-70) | #DCE1E4 | 74.6% | Cool Coastal Blue-Grey | ΔE 2.34 (95.1%) |
| Sherwin-Williams #1 | Rarified Air (SW 6525) | #E1E6E6 | 78.28% | Organic Sage Green-Grey | ΔE 3.03 (93.6%) |
| Sherwin-Williams #2 | Sky High (SW 6504) | #DCE7E8 | 78.1% | Cool Coastal Blue-Grey | ΔE 3.26 (93.2%) |
Cross-room ΔE=1.93 equivalent for M540-1: Lily White (2128-70) delivers identical 80.54% reflectance to M540-1 with -1.8 softer C*=2.33 chroma.
Visual ΔE=2.34 alternative to M540-1: Seattle Gray (2130-70) delivers -6.4 LRV points deeper than Bellflower Blue (M540-1) with -1.79 softer C*=2.34 chroma.
Visual ΔE=2.43 alternative to M540-1: First Snowfall (1618) delivers -7.3 LRV points deeper than Bellflower Blue (M540-1) with -1.51 softer C*=2.62 chroma.
Visual ΔE=3.03 alternative to M540-1: Rarified Air (SW 6525) delivers -2.7 LRV points deeper than Bellflower Blue (M540-1) with -2.36 softer C*=1.77 chroma.
Visual ΔE=3.26 alternative to M540-1: Sky High (SW 6504) delivers -2.9 LRV points deeper than Bellflower Blue (M540-1) with matched C*=3.89 saturation.
Visual ΔE=3.35 alternative to M540-1: Icicle (SW 6238) delivers -7.8 LRV points deeper than Bellflower Blue (M540-1) with -2.62 softer C*=1.51 chroma.
Coordinated ceiling, trim, wall, sightline, and accent pairings for Bellflower Blue (#E1E9EF, LRV 81%).
Bellflower Blue (M540-1, h°=248°) tempers intense afternoon sunlight on Behr walls.
Heart Pine & Medium Saddle Stained Oak paired with M540-1
2700K–3000K Warm LED for M540-1 (4000K renders #F1E6DB)
Need Bellflower Blue (M540-1, LRV 81%) brighter or deeper? Adjacent Behr fan-deck steps around #E1E9EF:
Calculate exact gallon volume for Behr Bellflower Blue (M540-1) accounting for standard North American door (21 sq.ft.) and window (15 sq.ft.) deductions.
Code M540-1 (Bellflower Blue) reflects 81% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Bellflower Blue (M540-1) registers J'=93.1, a'=-3.75, and b'=-5.13 with HSL (206°, 30%, 91%) and Helmholtz-Kohlrausch perceived value 92.4 L*_HK. Because M540-1 carries a*=-1.55 red-green and b*=-3.83 yellow-blue balance at chroma C*=4.13, Bellflower Blue projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Behr M540-1 predictably. Under 5000K noon daylight, Bellflower Blue (M540-1) holds its native #E9E7E5 swatch; at 4000K cool office LED, M540-1 adapts to #F1E6DB; at 3500K halogen, Bellflower Blue transitions to #F7E5D5; at 3000K residential LED, M540-1 warms to #FDE3CF; and under 2700K evening bulbs, Bellflower Blue (M540-1) settles at #FFE1CB.
When cross-matching Behr Bellflower Blue (M540-1, #E1E9EF), Benjamin Moore Lily White (2128-70, #E3E9EB, LRV 80.54%) scores ΔE2000=1.93 and CAM16=2.42, followed by Seattle Gray (2130-70, ΔE=2.34). In Sherwin-Williams, Rarified Air (SW 6525, #E1E6E6, LRV 78.28%) achieves ΔE2000=3.03 ahead of Sky High (SW 6504, ΔE=3.26). Coordinate M540-1 with Bakery Box (BL-W9) ceilings, White Glove (W-D-610) trim, Paparazzi Flash (MQ5-18) hallways, and Shaved Ice (N490-3) accents.
Spectrophotometric answers for homeowners, interior designers, and painting contractors specifying Behr Bellflower Blue.
Behr Bellflower Blue (M540-1) records an official Light Reflectance Value of 81% (#E1E9EF) and a Helmholtz-Kohlrausch perceived lightness of 92.4 L*_HK.
At 81% reflectance, Bellflower Blue (M540-1) sits in the high-reflectance architectural tier, bouncing daylight across Behr walls while maintaining HSL (206°, 30%, 91%).
CIELAB telemetry (L*=91.92, a*=-1.55, b*=-3.83) classifies Behr Bellflower Blue (M540-1) as a Cool Cool Coastal Blue-Grey with C*=4.13 chroma and h°=248° hue.
Pair Bellflower Blue (M540-1) with South & West Sun Exposure for M540-1 (81% LRV) and Heart Pine & Medium Saddle Stained Oak paired with M540-1. Under 2700K evening bulbs, M540-1 shifts from #E1E9EF toward #FFE1CB.
Closest verified equivalents to Behr Bellflower Blue (M540-1, #E1E9EF) are Benjamin Moore Lily White (2128-70, #E3E9EB) at ΔE2000=1.93 and Sherwin-Williams Rarified Air (SW 6525, #E1E6E6) at ΔE2000=3.03.
Both 2128-70 and SW 6525 matches are verified against Bellflower Blue (M540-1) in CIE ΔE2000 and CAM16-UCS space.
Alongside Behr Bellflower Blue (M540-1, LRV 81%), our Ou-Luo harmony engine specifies Behr White Glove (W-D-610, #F0EFED, LRV 86%) in Semi-Gloss or Satin.
Pairing White Glove (W-D-610) with Bellflower Blue (M540-1) frames door casings and baseboards cleanly.