The value structure of Gustave Jacquet is mid-key: quiet, controlled, and cohesive. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Chroma is held at a comfortable level - distinct colours, but no single hue is allowed to overwhelm. #3E160B delivers the chromatic peak at only 9.8% - a small shot of colour with outsized visual impact. 58 units of value range underpin the palette's structural clarity: the eye always knows where light falls. In the context of Gustave Jacquet's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.