Mid-key values give João Batista da Costa its characteristic quietness - nothing blazes, nothing disappears. 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 6.7% is devoted to #693E25, yet that small allocation delivers the palette's entire chromatic tension. A value spread of 63 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. The palette is recognisably João Batista da Costa's own: particular in its temperature, chroma, and the economy of its brightest note.