Trying limited colour palette. Mixing Zorn colours.
The Zorn limited palette is named after renowned Swedish artist Anders Leonard Zorn (February 18, 1860 – August 22, 1920). Best known for his portraits, domestic scenes and nudes in outdoor settings. He, like John Singer Sargent and Joaquín Sorolla, greatly admired by many realist artists today for his lively and skillful brushwork. Zorn is also known for using a palette limited to just four colors. It consists of just four colours being yellow ochre, ivory black, vermillion and titanium white. Cadmium red light is commonly used in place of vermilion by modern day artists.
My swatch on canvas panel and my palette on the right:
Yellow Ochre (Old Holland)
Cadmium Red light (Old Holland)
Bluish Black (Winsor& Newton professional line)  
​Titanium White (​Winsor& Newton)
Zorn self-portrait and paintings below:

1, 2 - Winter Exhibition, An Chead Tine, Kilkenny, Ireland, November 24 – December 22
3 - 5 - RACHT, Group exhibition, Herman’s auctioneers, Studio 10, Dublin, December 15-18
6 - 10 - Polyphonic, Dublin Art Book Fair, Temple Bar Gallery, December 07-17. My art book Cracks in the Mirrorr