Isaac Whitehead occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. 26.5% of the palette belongs to #1D2015, a concentration that makes it the unmistakable visual centre. The most saturated colour, #716531, is reserved to 3.5% of the surface, where it acts as a focal punctuation. From deepest dark to palest light, the palette traverses 58 units of the value scale - a span that creates natural depth. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 4 of Isaac Whitehead's sequence - a single chapter in a chromatic story told across many works.