Values in Robert Spencer rest in the mid-range - neither dramatically lit nor steeped in shadow. Temperature reads distinctly warm: the reds and earth tones from Robert Spencer carry the compositional weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #67482E - appears at just 9.7%, deployed as a precision accent against the quieter ground. 57 units of value range underpin the palette's structural clarity: the eye always knows where light falls. Palette 4 sits within the larger chromatic argument that Robert Spencer's complete body of work advances.