Ferdinand Hodler is high in key: pale, luminous, and filled with optical air. Ferdinand Hodler builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The most saturated colour, #B8D2D6, is reserved to 8.8% of the surface, where it acts as a focal punctuation. The value range of 47 units sits in the comfortable middle: enough depth, enough light, neither extreme. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 5 sits within the larger chromatic argument that Ferdinand Hodler's complete body of work advances.