Code P510-7 (Beacon Blue) reflects 10% of incident D65 light. Measured in CAM16-UCS uniform space, Behr Beacon Blue (P510-7) registers J'=40.6, a'=-5.69, and b'=-27.25 with HSL (212°, 60%, 37%) and Helmholtz-Kohlrausch perceived value 42.7 L*_HK. Because P510-7 carries a*=3.7 red-green and b*=-37.94 yellow-blue balance at chroma C*=38.12, Beacon Blue projects a cool rich violet-grey character across drywall and millwork.
Thermal lighting shifts Behr P510-7 predictably. Under 5000K noon daylight, Beacon Blue (P510-7) holds its native #2D5C92 swatch; at 4000K cool office LED, P510-7 adapts to #335B8C; at 3500K halogen, Beacon Blue transitions to #385B88; at 3000K residential LED, P510-7 warms to #3C5A85; and under 2700K evening bulbs, Beacon Blue (P510-7) settles at #3F5982.
When cross-matching Behr Beacon Blue (P510-7, #265C98), Benjamin Moore Blue Suede Shoes (798, #2F5688, LRV 8.8%) scores ΔE2000=3.03 and CAM16=3.74, followed by Mosaic (CC-874, ΔE=3.26). In Sherwin-Williams, Frank Blue (SW 6967, #225288, LRV 7.9%) achieves ΔE2000=3.66 ahead of Hyper Blue (SW 6965, ΔE=3.7). Coordinate P510-7 with Ultra Pure White 1850 (1850) ceilings, White Glove (W-D-610) trim, Integrity (P530-5) hallways, and Periwinkle (P530-4) accents.