Playing with analogous colors with one complement to suggest images:
I equate this method of painting to lying on the warm ground and watching the clouds suggest objects or people floating in the sky above me.
Deciding on a limited palette color scheme to explore, I mix puddles of watercolor paint and toss, splatter and spill the different colors onto a sheet of watercolor paper allowing them to mix and/or dry before applying another layer. I keep building the layers until something is suggested by the shapes and patterns of the color layers. At that point I begin to define the image I am seeing in my head. Often, I need to mix gouache with my watercolors to bring back light valued areas, creating edges to describe the object or figure.
The color scheme I played with in this painting is an analogous (purple, blue, green) with one complement (yellow).