Code SW 7637 (Oyster White) reflects 72.58% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Oyster White (SW 7637) registers J'=89.9, a'=-0.65, and b'=4.99 with HSL (43°, 24%, 85%) and Helmholtz-Kohlrausch perceived value 88.7 L*_HK. Because SW 7637 carries a*=-0.53 red-green and b*=6.98 yellow-blue balance at chroma C*=7, Oyster White projects a warm warm yellow-cream character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 7637 predictably. Under 5000K noon daylight, Oyster White (SW 7637) holds its native #EADBC7 swatch; at 4000K cool office LED, SW 7637 adapts to #F0DABE; at 3500K halogen, Oyster White transitions to #F6D9B9; at 3000K residential LED, SW 7637 warms to #FCD7B3; and under 2700K evening bulbs, Oyster White (SW 7637) settles at #FFD6B0.
When cross-matching Sherwin-Williams Oyster White (SW 7637, #E2DDD0), Behr Light Granite (N340-1, #E2DDCF, LRV 73%) scores ΔE2000=0.43 and CAM16=0.35, followed by Sand Drift (N310-1, ΔE=0.67). In Benjamin Moore, Olympic Mountains (971, #E2DDD0, LRV 72.58%) achieves ΔE2000=0 ahead of Fog Mist (OC-31, ΔE=0). Coordinate SW 7637 with High Reflective White (SW 7757) ceilings, Extra White (SW 7006) trim, Roycroft Mist Gray (SW 2844) hallways, and Silver Gray (SW 49) accents.