The palette of Johann Heinrich Roos sits in the lower register of the value scale - dense, contained, and weighted. Johann Heinrich Roos orchestrates warmth above all else - reds, ambers, and siennas take the lead. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. At 4.6%, #8A5D39 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. A value spread of 63 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of Johann Heinrich Roos's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.