I have continued with the outline drawing and have begun to consider which tone of blue I will use for the sky background. The jacaranda is many shades of light purple or lilac so the sky will need to be in contrast to that. From my test splotches I am leaning towards using the manganese blue hue rather than the cobalt blue as the latter has a purple hue and I want the sky in the background to be distinguished from the flowers. The tonal contrast will be provided by the flower stalks and small twig branches which will be almost silhouetted against the flowers and sky.