Code S470-1 (Cloudy Sky) reflects 64% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Cloudy Sky (S470-1) registers J'=85.9, a'=-8.12, and b'=-5.52 with HSL (192°, 24%, 81%) and Helmholtz-Kohlrausch perceived value 84.7 L*_HK. Because S470-1 carries a*=-5.37 red-green and b*=-4.64 yellow-blue balance at chroma C*=7.1, Cloudy Sky projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Behr S470-1 predictably. Under 5000K noon daylight, Cloudy Sky (S470-1) holds its native #CAD4D1 swatch; at 4000K cool office LED, S470-1 adapts to #D1D2C8; at 3500K halogen, Cloudy Sky transitions to #D6D1C2; at 3000K residential LED, S470-1 warms to #DDCFBD; and under 2700K evening bulbs, Cloudy Sky (S470-1) settles at #E2CEB9.
When cross-matching Behr Cloudy Sky (S470-1, #C2D5DA), Benjamin Moore Heaven On Earth (1661, #C3D7DD, LRV 65.24%) scores ΔE2000=0.65 and CAM16=0.85, followed by Silvery Blue (1647, ΔE=1.32). In Sherwin-Williams, Balmy (SW 6512, #C5D8DE, LRV 66.08%) achieves ΔE2000=0.88 ahead of Little Boy Blu (SW 9054, ΔE=1.27). Coordinate S470-1 with Polar Bear 1875 (1875) ceilings, Maui Mist (BL-W10) trim, Ethereal White (BL-W04) hallways, and Bakery Box (BL-W9) accents.