Giovanni Battista Gaulli sits in the centre of the value range, lending the palette a sense of even, sustained light. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. 40.1% of the palette belongs to #1D2022, a concentration that makes it the unmistakable visual centre. The highest-chroma note - #A68266 - appears at just 4.0%, deployed as a precision accent against the quieter ground. From deepest dark to palest light, the palette traverses 61 units of the value scale - a span that creates natural depth. Palette 4 sits within the larger chromatic argument that Giovanni Battista Gaulli's complete body of work advances.