Charles Victor Thirion 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. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. The dominant colour, #1A1A18, takes 25.0% of the total area, establishing the overall mood before any other hue is introduced. The highest-chroma note - #A86E43 - appears at just 2.7%, deployed as a precision accent against the quieter ground. At 60 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. This is palette 4 of Charles Victor Thirion's sequence - a single chapter in a chromatic story told across many works.