Code 1654 (Ashwood Gray) reflects 61.74% of incident D65 light. Measured in CAM16-UCS uniform space, Benjamin Moore Ashwood Gray (1654) registers J'=84.8, a'=-10.03, and b'=-6.99 with HSL (193°, 31%, 79%) and Helmholtz-Kohlrausch perceived value 83.8 L*_HK. Because 1654 carries a*=-7.22 red-green and b*=-6.38 yellow-blue balance at chroma C*=9.63, Ashwood Gray projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Benjamin Moore 1654 predictably. Under 5000K noon daylight, Ashwood Gray (1654) holds its native #C1D2D1 swatch; at 4000K cool office LED, 1654 adapts to #C8D0C8; at 3500K halogen, Ashwood Gray transitions to #CECFC2; at 3000K residential LED, 1654 warms to #D4CEBD; and under 2700K evening bulbs, Ashwood Gray (1654) settles at #D9CCB9.
When cross-matching Benjamin Moore Ashwood Gray (1654, #B9D3DA), Behr Air Blue (S460-1, #BCD9E0, LRV 66%) scores ΔE2000=1.57 and CAM16=1.94, followed by Sonata (530E-3, ΔE=1.6). In Sherwin-Williams, Atmospheric (SW 6505, #C2DAE0, LRV 66.78%) achieves ΔE2000=1.86 ahead of Stream (SW 6499, ΔE=2.48). Coordinate 1654 with Distant Gray (OC-68) ceilings, Ultra White (CC-10) trim, Fountain Spout (2059-70) hallways, and Ice Mist (2123-70) accents.