Code S340-4 (Back To Nature) reflects 48% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Back To Nature (S340-4) registers J'=77.1, a'=-4.03, and b'=13.81 with HSL (55°, 26%, 65%) and Helmholtz-Kohlrausch perceived value 76.2 L*_HK. Because S340-4 carries a*=-5.42 red-green and b*=21.88 yellow-blue balance at chroma C*=22.54, Back To Nature projects a warm rich green-beige character across drywall and millwork.
Thermal lighting shifts Behr S340-4 predictably. Under 5000K noon daylight, Back To Nature (S340-4) holds its native #C3B888 swatch; at 4000K cool office LED, S340-4 adapts to #C9B682; at 3500K halogen, Back To Nature transitions to #CEB57D; at 3000K residential LED, S340-4 warms to #D3B479; and under 2700K evening bulbs, Back To Nature (S340-4) settles at #D7B377.
When cross-matching Behr Back To Nature (S340-4, #BDB98F), Benjamin Moore Lewiville Green (494, #B9B790, LRV 46.43%) scores ΔE2000=1.22 and CAM16=1.22, followed by Georgian Green (HC-115, ΔE=1.22). In Sherwin-Williams, Baby Bok Choy (SW 9037, #BBB98A, LRV 47.38%) achieves ΔE2000=1.51 ahead of Koi Pond (SW 7727, ΔE=3.6). Coordinate S340-4 with Blanca Peak (HDC-NT-04G) ceilings, Ambience White (PR-W8) trim, Tonic (P360-3) hallways, and Dancing Butterfly (PPL-20) accents.