Code SW 7558 (Medici Ivory) reflects 82.48% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Medici Ivory (SW 7558) registers J'=93.9, a'=0.32, and b'=6.70 with HSL (39°, 54%, 90%) and Helmholtz-Kohlrausch perceived value 93.3 L*_HK. Because SW 7558 carries a*=0.4 red-green and b*=9.95 yellow-blue balance at chroma C*=9.96, Medici Ivory projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 7558 predictably. Under 5000K noon daylight, Medici Ivory (SW 7558) holds its native #FBE7CE swatch; at 4000K cool office LED, SW 7558 adapts to #FFE6C5; at 3500K halogen, Medici Ivory transitions to #FFE5BF; at 3000K residential LED, SW 7558 warms to #FFE3B9; and under 2700K evening bulbs, Medici Ivory (SW 7558) settles at #FFE1B6.
When cross-matching Sherwin-Williams Medici Ivory (SW 7558, #F3E9D7), Behr Cottage White (13, #F3E9D6, LRV 82%) scores ΔE2000=0.4 and CAM16=0.32, followed by Ceylon Cream (HDC-CL-17, ΔE=0.4). In Benjamin Moore, Franklin White (CW-200, #F1E7D4, LRV 80.85%) achieves ΔE2000=0.61 ahead of Pelican Beach (908, ΔE=0.78). Coordinate SW 7558 with High Reflective White (SW 7757) ceilings, Extra White (SW 7006) trim, Grecian Ivory (SW 7541) hallways, and Jogging Path (SW 7638) accents.