The value structure of Marsden Hartley is mid-key: quiet, controlled, and cohesive. Temperature is balanced: the palette pits warm earth against cool sky without declaring a winner. Colours are neither washed out nor blazing; they occupy the productive middle ground of the chroma scale. The saturated accent, #1436CF, registers at 2.9% - sparse enough to feel like a deliberate surprise. The full value range is 57 units: broad enough to build convincing three-dimensional form. Together these qualities point to the open-air Impressionist method: recording light rather than local colour. This is the light Marsden Hartley preferred, made measurable.