Code SW 7646 (First Star) reflects 69.33% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams First Star (SW 7646) registers J'=88.5, a'=-1.17, and b'=1.97 with HSL (50°, 7%, 84%) and Helmholtz-Kohlrausch perceived value 86.8 L*_HK. Because SW 7646 carries a*=-0.55 red-green and b*=2.58 yellow-blue balance at chroma C*=2.64, First Star projects a warm soft green-beige character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 7646 predictably. Under 5000K noon daylight, First Star (SW 7646) holds its native #E2D8CB swatch; at 4000K cool office LED, SW 7646 adapts to #E8D6C2; at 3500K halogen, First Star transitions to #EED5BC; at 3000K residential LED, SW 7646 warms to #F4D3B7; and under 2700K evening bulbs, First Star (SW 7646) settles at #F9D2B4.
When cross-matching Sherwin-Williams First Star (SW 7646, #DAD9D4), Behr Silver Tradition (ICC-23, #D9D9D3, LRV 69%) scores ΔE2000=0.79 and CAM16=0.65, followed by Seagull Gray (N360-1, ΔE=1.2). In Benjamin Moore, Shoreline (1471, #D9D8D3, LRV 68.61%) achieves ΔE2000=0.23 ahead of Whisper (CSP-500, ΔE=1.1). Coordinate SW 7646 with High Reflective White (SW 7757) ceilings, Pure White (SW 7005) trim, Extra White (SW 7006) hallways, and Ellie Gray (SW 7650) accents.