Code SW 6534 (Icy) reflects 55.91% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Icy (SW 6534) registers J'=82.0, a'=-4.35, and b'=-8.10 with HSL (209°, 20%, 78%) and Helmholtz-Kohlrausch perceived value 80.4 L*_HK. Because SW 6534 carries a*=-1.92 red-green and b*=-6.88 yellow-blue balance at chroma C*=7.14, Icy projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 6534 predictably. Under 5000K noon daylight, Icy (SW 6534) holds its native #C2C6C9 swatch; at 4000K cool office LED, SW 6534 adapts to #C9C5C1; at 3500K halogen, Icy transitions to #CEC3BB; at 3000K residential LED, SW 6534 warms to #D4C2B6; and under 2700K evening bulbs, Icy (SW 6534) settles at #D8C1B3.
When cross-matching Sherwin-Williams Icy (SW 6534, #BBC7D2), Behr Journey's End (S520-2, #BAC9D4, LRV 57%) scores ΔE2000=1.25 and CAM16=1.29, followed by Melody (UL240-14, ΔE=1.48). In Benjamin Moore, Instinct (AF-575, #BAC5D0, LRV 54.78%) achieves ΔE2000=0.62 ahead of Iced Slate (2130-60, ΔE=2.03). Coordinate SW 6534 with High Reflective White (SW 7757) ceilings, Extra White (SW 7006) trim, Iceberg (SW 6798) hallways, and Ceiling Bright White (SW 7007) accents.