I wanted to do something different with the colours, so I decided to use secondaries as my base. The first in-progress shot (below) shows the Cadmium Orange and Deep Violet underpainting. The white is that of the canvas.
Acrylic on canvas, 50 x 20 cm
Note: All the in-progress shots were taken yesterday evening, under artificial light. The main photograph was taken mid-morning today, in subdued daylight.