Code CSP-590 (Early Frost) reflects 61.11% of incident D65 light. Measured in CAM16-UCS uniform space, Benjamin Moore Early Frost (CSP-590) registers J'=84.7, a'=-3.04, and b'=-3.24 with HSL (202°, 8%, 80%) and Helmholtz-Kohlrausch perceived value 82.7 L*_HK. Because CSP-590 carries a*=-1.14 red-green and b*=-2.08 yellow-blue balance at chroma C*=2.37, Early Frost projects a cool cool coastal blue-grey character across drywall and millwork.
Thermal lighting shifts Benjamin Moore CSP-590 predictably. Under 5000K noon daylight, Early Frost (CSP-590) holds its native #D0CDC8 swatch; at 4000K cool office LED, CSP-590 adapts to #D7CBC0; at 3500K halogen, Early Frost transitions to #DCCABA; at 3000K residential LED, CSP-590 warms to #E2C9B5; and under 2700K evening bulbs, Early Frost (CSP-590) settles at #E7C7B1.
When cross-matching Benjamin Moore Early Frost (CSP-590, #C9CED1), Behr Silver Shadow (N510-1, #CFD2D3, LRV 64%) scores ΔE2000=1.58 and CAM16=2.11, followed by Hush (PPU26-16, ΔE=1.63). In Sherwin-Williams, North Star (SW 6246, #CAD0D2, LRV 62.27%) achieves ΔE2000=0.92 ahead of Evening Shadow (SW 7662, ΔE=1.27). Coordinate CSP-590 with Super White (OC-152) ceilings, Ultra White (CC-10) trim, Misty Gray (2124-60) hallways, and Distant Gray (2124-70) accents.