Code PWN-16 (Day Spa) reflects 85% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Day Spa (PWN-16) registers J'=94.9, a'=-3.77, and b'=-0.22 with HSL (156°, 14%, 93%) and Helmholtz-Kohlrausch perceived value 94.2 L*_HK. Because PWN-16 carries a*=-2.02 red-green and b*=0.38 yellow-blue balance at chroma C*=2.06, Day Spa projects a cool organic sage green-grey character across drywall and millwork.
Thermal lighting shifts Behr PWN-16 predictably. Under 5000K noon daylight, Day Spa (PWN-16) holds its native #F2EDE3 swatch; at 4000K cool office LED, PWN-16 adapts to #FAECD9; at 3500K halogen, Day Spa transitions to #FFEBD3; at 3000K residential LED, PWN-16 warms to #FFE9CD; and under 2700K evening bulbs, Day Spa (PWN-16) settles at #FFE7C9.
When cross-matching Behr Day Spa (PWN-16, #EAEFED), Benjamin Moore Palest Pistachio (2122-60, #E9EFED, LRV 85.14%) scores ΔE2000=0.45 and CAM16=0.45, followed by White Diamond (2121-60, ΔE=0.97). In Sherwin-Williams, Ceiling Bright White (SW 7007, #E9EBE7, LRV 82.53%) achieves ΔE2000=1.71 ahead of Snowdrop (SW 6511, ΔE=2.09). Coordinate PWN-16 with Ultra Pure White (W-B-500) ceilings, Vibrant White (BWC-12) trim, Double Click (N530-2) hallways, and Silver Mine (PPU26-18) accents.