Jan Siberechts occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. 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 30.7%, #130D0D functions less as a colour accent and more as a complete atmospheric environment. #B79065 delivers the chromatic peak at only 4.1% - a small shot of colour with outsized visual impact. The full value range is 64 units: broad enough to build convincing three-dimensional form. Jan Siberechts's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.