Code 631 (Aberdeen Green) reflects 65.03% of incident D65 light. Measured in CAM16-UCS uniform space, Benjamin Moore Aberdeen Green (631) registers J'=86.3, a'=-10.23, and b'=2.45 with HSL (146°, 21%, 81%) and Helmholtz-Kohlrausch perceived value 85.5 L*_HK. Because 631 carries a*=-9.28 red-green and b*=3.52 yellow-blue balance at chroma C*=9.93, Aberdeen Green projects a cool organic sage green-grey character across drywall and millwork.
Thermal lighting shifts Benjamin Moore 631 predictably. Under 5000K noon daylight, Aberdeen Green (631) holds its native #CBD7C4 swatch; at 4000K cool office LED, 631 adapts to #D2D5BB; at 3500K halogen, Aberdeen Green transitions to #D8D4B5; at 3000K residential LED, 631 warms to #DED2B0; and under 2700K evening bulbs, Aberdeen Green (631) settles at #E3D1AD.
When cross-matching Benjamin Moore Aberdeen Green (631, #C3D8CC), Behr Moon Glass (S420-2, #BCD1C7, LRV 61%) scores ΔE2000=1.83 and CAM16=2.38, followed by Ice Rink (M430-2, ΔE=2.19). In Sherwin-Williams, Breaktime (SW 6463, #C4D9CE, LRV 65.77%) achieves ΔE2000=0.48 ahead of Waterscape (SW 6470, ΔE=1.92). Coordinate 631 with Snow White (2122-70) ceilings, White (OC-151) trim, Fresh Mint (2037-70) hallways, and Chantilly Lace (OC-65) accents.