Code SW 6161 (Nonchalant White) reflects 71.95% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Nonchalant White (SW 6161) registers J'=89.6, a'=-1.97, and b'=4.48 with HSL (55°, 16%, 85%) and Helmholtz-Kohlrausch perceived value 88.4 L*_HK. Because SW 6161 carries a*=-1.76 red-green and b*=6.01 yellow-blue balance at chroma C*=6.26, Nonchalant White projects a warm soft green-beige character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 6161 predictably. Under 5000K noon daylight, Nonchalant White (SW 6161) holds its native #E6DCC8 swatch; at 4000K cool office LED, SW 6161 adapts to #EDDABF; at 3500K halogen, Nonchalant White transitions to #F2D9BA; at 3000K residential LED, SW 6161 warms to #F8D7B4; and under 2700K evening bulbs, Nonchalant White (SW 6161) settles at #FDD6B1.
When cross-matching Sherwin-Williams Nonchalant White (SW 6161, #DEDDD1), Behr Alpine Frost (BWC-28, #E0DED2, LRV 73%) scores ΔE2000=0.56 and CAM16=0.54, followed by Coconut Ice (OR-W6, ΔE=0.74). In Benjamin Moore, Going To The Chapel (1527, #E0DED1, LRV 72.82%) achieves ΔE2000=0.61 ahead of Halo (OC-46, ΔE=0.61). Coordinate SW 6161 with High Reflective White (SW 7757) ceilings, Arcade White (SW 7100) trim, Austere Gray (SW 6184) hallways, and Sensible Hue (SW 6198) accents.