Rudolf Koller sits in the centre of the value range, lending the palette a sense of even, sustained light. Rudolf Koller builds on cool foundations: the palette favours the blue-cyan-green arc. All colours lean toward grey, building depth through value rather than colour punch. The dominant colour, #232321, takes 31.5% of the total area, establishing the overall mood before any other hue is introduced. The saturated accent, #C4A359, registers at 2.5% - sparse enough to feel like a deliberate surprise. 47 units of value spread create a palette that is varied but unified - contrast in the service of harmony. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. In the context of Rudolf Koller's full range of palettes, group 7 represents one movement in an ongoing chromatic dialogue.