Low-key values are the structural spine of Robert William Buss, giving it gravity and atmosphere. Neither warm nor cool has the upper hand here; the equilibrium between the two generates the palette's visual energy. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. A single dominant - #180E0F at 30.0% - sets the character of the whole composition. #431E13 delivers the chromatic peak at only 2.7% - a small shot of colour with outsized visual impact. The full value range is 60 units: broad enough to build convincing three-dimensional form. Together these qualities place Robert William Buss firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display. Palette 5 sits within the larger chromatic argument that Robert William Buss's complete body of work advances.