Impressionism is high-key - luminous, open, and weighted toward light. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. All colours lean toward grey, building depth through value rather than colour punch. The saturated accent, #554433, registers at 4.1% - sparse enough to feel like a deliberate surprise. From deepest dark to palest light, the palette traverses 59 units of the value scale - a span that creates natural depth. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source.