Abraham Mignon is low-key throughout, a quality associated with Nocturnal Sienna - deep shadows dominate the composition. Abraham Mignon 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. #221F1D at 28.7% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. The highest-chroma note - #54301F - appears at just 4.9%, deployed as a precision accent against the quieter ground. 67 units of value range underpin the palette's structural clarity: the eye always knows where light falls. This tonal restraint is characteristic of the Abraham Mignon approach: colour serves light, not the reverse. Palette 4 sits within the larger chromatic argument that Abraham Mignon's complete body of work advances.