Code 12 (Swiss Coffee) reflects 84% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Swiss Coffee (12) registers J'=94.7, a'=-1.03, and b'=4.85 with HSL (46°, 38%, 91%) and Helmholtz-Kohlrausch perceived value 94.2 L*_HK. Because 12 carries a*=-0.88 red-green and b*=6.77 yellow-blue balance at chroma C*=6.83, Swiss Coffee projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Behr 12 predictably. Under 5000K noon daylight, Swiss Coffee (12) holds its native #F9EBD7 swatch; at 4000K cool office LED, 12 adapts to #FFEACD; at 3500K halogen, Swiss Coffee transitions to #FFE9C7; at 3000K residential LED, 12 warms to #FFE7C1; and under 2700K evening bulbs, Swiss Coffee (12) settles at #FFE5BE.
When cross-matching Behr Swiss Coffee (12, #F1EDE0), Benjamin Moore Vapor (AF-35, #EFECDF, LRV 83.81%) scores ΔE2000=0.55 and CAM16=0.51, followed by Stoneware (CSP-245, ΔE=1.04). In Sherwin-Williams, Classic Light Buff (SW 50, #F0EADC, LRV 82.71%) achieves ΔE2000=1.1 ahead of Dover White (SW 6385, ΔE=1.1). Coordinate 12 with Ultra Pure White 1850 (1850) ceilings, Ambience White (PR-W8) trim, Sawgrass (N350-2) hallways, and Sierra Madre (ECC-46-1) accents.