Values in Ozias Humphry rest in the mid-range - neither dramatically lit nor steeped in shadow. Ozias Humphry builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #8F502F functions as the palette's exclamation mark: highest chroma, lowest percentage (5.9%). 66 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. These proportions encode Ozias Humphry's instinctive sense of how much of each quality the eye can hold.