Code SW 6778 (Aviary Blue) reflects 72.52% of incident D65 light. Measured in CAM16-UCS uniform space, Sherwin-Williams Aviary Blue (SW 6778) registers J'=89.7, a'=-11.13, and b'=-6.16 with HSL (189°, 42%, 84%) and Helmholtz-Kohlrausch perceived value 89.3 L*_HK. Because SW 6778 carries a*=-8.49 red-green and b*=-5.65 yellow-blue balance at chroma C*=10.2, Aviary Blue projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Sherwin-Williams SW 6778 predictably. Under 5000K noon daylight, Aviary Blue (SW 6778) holds its native #CFE2DF swatch; at 4000K cool office LED, SW 6778 adapts to #D6E0D5; at 3500K halogen, Aviary Blue transitions to #DCDFCF; at 3000K residential LED, SW 6778 warms to #E3DDC9; and under 2700K evening bulbs, Aviary Blue (SW 6778) settles at #E8DCC5.
When cross-matching Sherwin-Williams Aviary Blue (SW 6778, #C6E3E8), Behr Winterscape (M480-2A, #C9E5EB, LRV 74%) scores ΔE2000=0.81 and CAM16=0.94, followed by Ethereal Mood (MQ3-52, ΔE=1.15). In Benjamin Moore, Crystal Springs (764, #C8E6EA, LRV 74.57%) achieves ΔE2000=0.87 ahead of Blue Allure (771, ΔE=1.59). Coordinate SW 6778 with High Reflective White (SW 7757) ceilings, Pure White (SW 7005) trim, Agua Fría (SW 9053) hallways, and French Moire (SW 9056) accents.