Acrylics on Masonite, 15 x 20 cm:
I tried out a limited palette of titanium white, ivory black, burnt sienna and yellow ochre. Supposedly, ivory black has a bluish cast, so one can mix subdued blues and greens from it, but it depends on the brand, I think: my tube is as pitch black as lamp black, so no blues, and my attempt at green (by mixing some of the black into ochre yellow) perhaps came out more brownish than green. Well, with the limited palette, you do not expect bright colors, and for some subjects I rather like the stark, subdued tone you get from monochrome or limited palette paintings.