Code BXC-04 (Cavern Echo) reflects 55% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Cavern Echo (BXC-04) registers J'=81.9, a'=1.01, and b'=6.45 with HSL (36°, 22%, 75%) and Helmholtz-Kohlrausch perceived value 79.9 L*_HK. Because BXC-04 carries a*=1.14 red-green and b*=9.42 yellow-blue balance at chroma C*=9.49, Cavern Echo projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Behr BXC-04 predictably. Under 5000K noon daylight, Cavern Echo (BXC-04) holds its native #D5C2AB swatch; at 4000K cool office LED, BXC-04 adapts to #DBC0A4; at 3500K halogen, Cavern Echo transitions to #DFBF9E; at 3000K residential LED, BXC-04 warms to #E5BE9A; and under 2700K evening bulbs, Cavern Echo (BXC-04) settles at #E9BC97.
When cross-matching Behr Cavern Echo (BXC-04, #CEC3B3), Benjamin Moore Smokey Taupe (983, #CDC4B5, LRV 55.96%) scores ΔE2000=0.92 and CAM16=0.7, followed by Inukshuk (CC-460, ΔE=0.92). In Sherwin-Williams, Accessible Beige (SW 7036, #D1C7B8, LRV 58.03%) achieves ΔE2000=1.09 ahead of Sandbar (SW 7547, ΔE=1.29). Coordinate BXC-04 with Frost Bl-w15 (BL-W15) ceilings, White Glove (W-D-610) trim, Eurolinen (250E-1) hallways, and Historic Cream (ECC-49-2) accents.