Christina Robertson occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Warm hues command this palette; Christina Robertson favours the reds, oranges, and yellows of firelight and earth. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #A68A67 functions as the palette's exclamation mark: highest chroma, lowest percentage (9.6%). 72 units of value range underpin the palette's structural clarity: the eye always knows where light falls. These proportions encode Christina Robertson's instinctive sense of how much of each quality the eye can hold.