John Boultbee occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Temperature is balanced: the palette pits warm earth against cool sky without declaring a winner. All colours lean toward grey, building depth through value rather than colour punch. Only 6.3% is devoted to #361C11, yet that small allocation delivers the palette's entire chromatic tension. The full value range is 66 units: broad enough to build convincing three-dimensional form. In the context of John Boultbee's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.