Charles Hayter occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #273A65 delivers the chromatic peak at only 4.1% - a small shot of colour with outsized visual impact. A value spread of 70 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. This is the light Charles Hayter preferred, made measurable.