John French Sloan is low-key throughout, a quality associated with Nocturnal Sienna - deep shadows dominate the composition. John French Sloan orchestrates warmth above all else - reds, ambers, and siennas take the lead. All colours lean toward grey, building depth through value rather than colour punch. At 29.8%, #181416 functions less as a colour accent and more as a complete atmospheric environment. The saturated accent, #D9CEAB, registers at 3.3% - sparse enough to feel like a deliberate surprise. From deepest dark to palest light, the palette traverses 65 units of the value scale - a span that creates natural depth. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. Palette 10 sits within the larger chromatic argument that John French Sloan's complete body of work advances.