Low-key values are the structural spine of Gerrit Dou, giving it gravity and atmosphere. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The most saturated colour, #C39967, is reserved to 3.3% of the surface, where it acts as a focal punctuation. The value range of 52 units sits in the comfortable middle: enough depth, enough light, neither extreme. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of Gerrit Dou's full range of palettes, group 12 represents one movement in an ongoing chromatic dialogue.