I finished the series of 14 but will just post a few more. These all had weird self-imposed limitations and the colors turned out a bit muddy in the photos. The hardest was the all cool palette. Our of alizarin crimson, cad lemon, and pthalo blue it's really easy to make fluorescent greens and purples, but much harder to approach flesh tones. Basically just have to make it as muddy as possible and work into it with chroma from there. Learned a lot and nearly killed myself. I'm going to continue on as a side project though.
limitation: all warms (cad red deep, cad yellow deep, ultramarine)
limitation: all cools (alizarin crimson, cad lemon, pthalo)