Roderic O'Conor occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Roderic O'Conor builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #5B6B30 functions as the palette's exclamation mark: highest chroma, lowest percentage (6.6%). At 73 units of value range, the palette has the tonal breadth to sustain complex spatial readings. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 4 of Roderic O'Conor's sequence - a single chapter in a chromatic story told across many works.