Values in Purism rest in the mid-range - neither dramatically lit nor steeped in shadow. The dominant temperature is warm, with earth tones and fire-hues setting the emotional key. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. At 3.8%, #51865A carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. Value range is moderate at 44 units - enough contrast for legibility, not so much as to fragment the tonal unity.