Walter Langley occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The most saturated colour, #C29759, is reserved to 5.0% of the surface, where it acts as a focal punctuation. At 65 units of value range, the palette has the tonal breadth to sustain complex spatial readings. This is the light Walter Langley preferred, made measurable.