Arthur Fitzwilliam Tait occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Arthur Fitzwilliam Tait builds on cool foundations: the palette favours the blue-cyan-green arc. All colours lean toward grey, building depth through value rather than colour punch. The highest-chroma note - #181208 - appears at just 4.6%, deployed as a precision accent against the quieter ground. A value spread of 59 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Arthur Fitzwilliam Tait's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.