Code HDC-CT-16 (Billowing Clouds) reflects 70% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Billowing Clouds (HDC-CT-16) registers J'=88.8, a'=-3.44, and b'=-1.99 with HSL (190°, 8%, 85%) and Helmholtz-Kohlrausch perceived value 87.2 L*_HK. Because HDC-CT-16 carries a*=-1.5 red-green and b*=-1.08 yellow-blue balance at chroma C*=1.85, Billowing Clouds projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Behr HDC-CT-16 predictably. Under 5000K noon daylight, Billowing Clouds (HDC-CT-16) holds its native #DEDAD3 swatch; at 4000K cool office LED, HDC-CT-16 adapts to #E5D8CA; at 3500K halogen, Billowing Clouds transitions to #EAD7C4; at 3000K residential LED, HDC-CT-16 warms to #F1D5BF; and under 2700K evening bulbs, Billowing Clouds (HDC-CT-16) settles at #F5D4BB.
When cross-matching Behr Billowing Clouds (HDC-CT-16, #D6DBDC), Benjamin Moore Bunny Gray (2124-50, #D6DBDC, LRV 70.08%) scores ΔE2000=0 and CAM16=0, followed by Gray Cloud (2126-60, ΔE=0.59). In Sherwin-Williams, Icicle (SW 6238, #DBDFE0, LRV 73.18%) achieves ΔE2000=1.07 ahead of Olympus White (SW 6253, ΔE=1.26). Coordinate HDC-CT-16 with Blanca Peak (HDC-NT-04G) ceilings, Vibrant White (BWC-12) trim, Frost 1857 (1857) hallways, and Ultra Pure White 1850 (1850) accents.