Code W-F-310 (Cottage White) reflects 84.47% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Cottage White (W-F-310) registers J'=94.6, a'=-0.41, and b'=6.90 with HSL (42°, 55%, 90%) and Helmholtz-Kohlrausch perceived value 94.3 L*_HK. Because W-F-310 carries a*=-0.46 red-green and b*=10.17 yellow-blue balance at chroma C*=10.18, Cottage White projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Behr W-F-310 predictably. Under 5000K noon daylight, Cottage White (W-F-310) holds its native #FCEAD0 swatch; at 4000K cool office LED, W-F-310 adapts to #FFE9C7; at 3500K halogen, Cottage White transitions to #FFE7C0; at 3000K residential LED, W-F-310 warms to #FFE6BB; and under 2700K evening bulbs, Cottage White (W-F-310) settles at #FFE4B7.
When cross-matching Behr Cottage White (W-F-310, #F4ECD9), Benjamin Moore Lily Of The Valley (905, #F7EFDC, LRV 86.91%) scores ΔE2000=0.63 and CAM16=0.9, followed by Windswept (OC-94, ΔE=0.63). In Sherwin-Williams, Paperwhite (SW 7105, #F7EFDE, LRV 87%) achieves ΔE2000=1.04 ahead of Honied White (SW 7106, ΔE=1.08). Coordinate W-F-310 with Ultra Pure White 1850 (1850) ceilings, White Glove (W-D-610) trim, Aged Beige (PPU7-09) hallways, and Historical Ruins (BXC-19) accents.