Cass Gilbert is high-key - luminous, open, and weighted toward light. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #B77355 delivers the chromatic peak at only 4.2% - a small shot of colour with outsized visual impact. A value spread of 68 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Cass Gilbert arrived at this balance through long practice; the palette carries the weight of that experience.