poster as a style is partly defined by its colour: this palette makes that definition concrete. poster occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. The palette achieves thermal balance - reds and blues, ochres and greens, each holding the other in check. A restrained, mid-chroma palette: every hue is present and legible, but nothing shouts. The highest-chroma note - #E8DECA - appears at just 8.3%, deployed as a precision accent against the quieter ground. The full value range is 64 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 that poster painters chose to live inside.