Cup, Twig and Shell

I thought I'd do something with an even more limited palette this time. I used ultramarine blue, burnt sienna and white (although I did cheat and use a bit of cadmium yellow as well so that defeated the object really!) Also I wanted to paint 3 objects with different 'home values' ie, a light object, a mid-tone object and a dark object. I got this idea from reading a book by an artist called Charles Sovek.