You can see numerous demonstrations and a full exploration of my approach in my online course.
The studies are done small and quickly. Most are less than 3x5" and completed in 20 minutes to an hour.
My watercolor palette. (all Winsor and Newton brand unless otherwise noted.)
permanent white designers gouache
winsor yellow deep
permanent alizarin crimson
french ultramarine blue
phthalo blue (winsor blue greenshade)
phthalo green (winsor green blueshade)
permanent sap green
leaf green (Holbein brand)
venetian red (or indian red)
van dyke brown