Code SW 7648 (Big Chill) reflects 61.82% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Big Chill (SW 7648) registers J'=85.0, a'=-0.71, and b'=2.06 with HSL (43°, 7%, 80%) and Helmholtz-Kohlrausch perceived value 83 L*_HK. Because SW 7648 carries a*=-0.21 red-green and b*=2.72 yellow-blue balance at chroma C*=2.73, Big Chill projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 7648 predictably. Under 5000K noon daylight, Big Chill (SW 7648) holds its native #D7CDC1 swatch; at 4000K cool office LED, SW 7648 adapts to #DECBB8; at 3500K halogen, Big Chill transitions to #E3CAB3; at 3000K residential LED, SW 7648 warms to #E9C8AE; and under 2700K evening bulbs, Big Chill (SW 7648) settles at #EDC7AA.
When cross-matching Sherwin-Williams Big Chill (SW 7648, #D0CEC9), Behr Gazebo Gray (PPF-18, #D1D0CB, LRV 63%) scores ΔE2000=0.67 and CAM16=0.72, followed by Polar Fox (HDC-NT-17G, ΔE=1.08). In Benjamin Moore, Barren Plain (2111-60, #D3D0C9, LRV 63.25%) achieves ΔE2000=1.09 ahead of Lilac Hush (CSP-490, ΔE=1.49). Coordinate SW 7648 with High Reflective White (SW 7757) ceilings, Ibis White (SW 7000) trim, Pure White (SW 7005) hallways, and Cotton White (SW 7104) accents.