George Luks is low-key throughout, a quality associated with Tenebrous Sienna - deep shadows dominate the composition. The dominant temperature is warm, with earth tones and fire-hues setting the emotional key. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #181614 claims 49.2% of the surface, functioning as the work's tonal foundation. Only 2.8% is devoted to #D09042, yet that small allocation delivers the palette's entire chromatic tension. The full value range is 61 units: broad enough to build convincing three-dimensional form. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. This is palette 7 of George Luks's sequence - a single chapter in a chromatic story told across many works.