The value structure of Raphael Kirchner is mid-key: quiet, controlled, and cohesive. Raphael Kirchner builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is measured and controlled, giving the palette presence without visual aggression. The highest-chroma note - #CDD47A - appears at just 3.5%, deployed as a precision accent against the quieter ground. A value spread of 55 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 13 sits within the larger chromatic argument that Raphael Kirchner's complete body of work advances.