Frank Cadogan Cowper occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Yellow, ochre, sienna: warm hues that Frank Cadogan Cowper deploys as the palette's primary energy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. 29.5% of the palette belongs to #211D1B, a concentration that makes it the unmistakable visual centre. #C67047 delivers the chromatic peak at only 2.7% - a small shot of colour with outsized visual impact. 60 units of value range underpin the palette's structural clarity: the eye always knows where light falls. Palette 4 sits within the larger chromatic argument that Frank Cadogan Cowper's complete body of work advances.