Code 23 (Antique White) reflects 73% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Antique White (23) registers J'=90.2, a'=0.55, and b'=7.15 with HSL (38°, 39%, 85%) and Helmholtz-Kohlrausch perceived value 89.2 L*_HK. Because 23 carries a*=0.61 red-green and b*=10.67 yellow-blue balance at chroma C*=10.69, Antique White projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Behr 23 predictably. Under 5000K noon daylight, Antique White (23) holds its native #F0DBC1 swatch; at 4000K cool office LED, 23 adapts to #F6DAB9; at 3500K halogen, Antique White transitions to #FCD9B3; at 3000K residential LED, 23 warms to #FFD7AE; and under 2700K evening bulbs, Antique White (23) settles at #FFD5AA.
When cross-matching Behr Antique White (23, #E8DDCA), Benjamin Moore Lambskin (1051, #E8DCC8, LRV 72.76%) scores ΔE2000=0.52 and CAM16=0.48, followed by Lambskin (CC-340, ΔE=0.52). In Sherwin-Williams, Aged White (SW 9180, #E8DECD, LRV 74.02%) achieves ΔE2000=0.8 ahead of Casa Blanca (SW 7571, ΔE=1.05). Coordinate 23 with Ultra Pure White® (UPW) ceilings, Silver Chalice (640E-1) trim, Sierra Madre (ECC-46-1) hallways, and Pebble Stone (750D-4) accents.