Otto Mueller is high-key - luminous, open, and weighted toward light. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Only 4.0% is devoted to #BC9F73, yet that small allocation delivers the palette's entire chromatic tension. 45 units of value spread create a palette that is varied but unified - contrast in the service of harmony. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 1 of Otto Mueller's sequence - a single chapter in a chromatic story told across many works.