Sidney Richard Percy distributes its values across the middle register, creating harmony without high contrast. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. A restrained, mid-chroma palette: every hue is present and legible, but nothing shouts. The highest-chroma note - #DEBF7C - appears at just 13.6%, deployed as a precision accent against the quieter ground. The full value range is 63 units: broad enough to build convincing three-dimensional form. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. This is palette 1 of Sidney Richard Percy's sequence - a single chapter in a chromatic story told across many works.