Values in William Rowell Derrick rest in the mid-range - neither dramatically lit nor steeped in shadow. William Rowell Derrick builds on cool foundations: the palette favours the blue-cyan-green arc. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. #B19052 delivers the chromatic peak at only 8.5% - a small shot of colour with outsized visual impact. At 33 units across the value scale, the palette keeps contrast readable without letting it dominate. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. William Rowell Derrick's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.