Rudolf Koller distributes its values across the middle register, creating harmony without high contrast. Temperature is cool-dominant, with blue and green families claiming the largest areas. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #A8824C delivers the chromatic peak at only 3.4% - a small shot of colour with outsized visual impact. At 65 units of value range, the palette has the tonal breadth to sustain complex spatial readings. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Rudolf Koller's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.