Code W-F-300 (Cotton Whisper) reflects 88% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Cotton Whisper (W-F-300) registers J'=96.2, a'=-0.00, and b'=6.60 with HSL (40°, 73%, 93%) and Helmholtz-Kohlrausch perceived value 96.1 L*_HK. Because W-F-300 carries a*=0.04 red-green and b*=9.77 yellow-blue balance at chroma C*=9.77, Cotton Whisper projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Behr W-F-300 predictably. Under 5000K noon daylight, Cotton Whisper (W-F-300) holds its native #FFEFD6 swatch; at 4000K cool office LED, W-F-300 adapts to #FFEECC; at 3500K halogen, Cotton Whisper transitions to #FFECC6; at 3000K residential LED, W-F-300 warms to #FFEAC0; and under 2700K evening bulbs, Cotton Whisper (W-F-300) settles at #FFE9BC.
When cross-matching Behr Cotton Whisper (W-F-300, #FAF1DF), Benjamin Moore Paradise Beach (911, #F7EEDB, LRV 86.28%) scores ΔE2000=0.76 and CAM16=0.98, followed by Bare (OC-98, ΔE=0.76). In Sherwin-Williams, Paperwhite (SW 7105, #F7EFDE, LRV 87%) achieves ΔE2000=0.67 ahead of Honied White (SW 7106, ΔE=0.78). Coordinate W-F-300 with Blanca Peak (HDC-NT-04G) ceilings, White Glove (W-D-610) trim, Windrush (HDC-CT-19) hallways, and Washed Khaki (UL170-8) accents.