Hippolyte Petitjean keeps values measured and balanced, a hallmark of tonal restraint. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. All colours lean toward grey, building depth through value rather than colour punch. #6F4B48 delivers the chromatic peak at only 10.5% - a small shot of colour with outsized visual impact. Value range is moderate at 29 units - enough contrast for legibility, not so much as to fragment the tonal unity. This is palette 4 of Hippolyte Petitjean's sequence - a single chapter in a chromatic story told across many works.