These have all been painted with a limited palette of Cadmium Yellow Light, Cadmium Orange, Cadmium Red Light, Alizarin Crimson, Ultramarine Blue, and Phthalo Green, with the exception of "Catching Waves", which I painted using only Cadmium Yellow Light, Cadmium Red Light, Alizarin Crimson, and Ultramarine Blue.
I've also been experimenting with a new medium. It's a mixture of Galkyd, Gamsol, and linseed oil. I've been liking the working properties so far. More linseed oil will slow the drying time. It gets a little tacky after a short while, allowing me to apply several layers in one painting session. However it stays wet for a day or two, so I can still have time to go back and soften edges.