The value structure of Walter Gramatté is mid-key: quiet, controlled, and cohesive. Walter Gramatté builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is measured and controlled, giving the palette presence without visual aggression. The most saturated colour, #EA6737, is reserved to 10.2% of the surface, where it acts as a focal punctuation. 49 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. In the context of Walter Gramatté's full range of palettes, group 5 represents one movement in an ongoing chromatic dialogue.