George Washington Lambert is low-key throughout, a quality associated with Nocturnal Sienna - deep shadows dominate the composition. George Washington Lambert orchestrates warmth above all else - reds, ambers, and siennas take the lead. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. #181415 at 37.8% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. The highest-chroma note - #594526 - appears at just 3.6%, deployed as a precision accent against the quieter ground. A value spread of 60 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. Together these qualities place George Washington Lambert firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display. This is palette 9 of George Washington Lambert's sequence - a single chapter in a chromatic story told across many works.