Ferdinand Bol is low-key throughout, a quality associated with Nocturnal Bister - deep shadows dominate the composition. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The saturated accent, #E49C6C, registers at 1.8% - sparse enough to feel like a deliberate surprise. 63 units of value range underpin the palette's structural clarity: the eye always knows where light falls. Together these qualities place Ferdinand Bol firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display. This is palette 7 of Ferdinand Bol's sequence - a single chapter in a chromatic story told across many works.