For me, Richard Diebenkorn's paintings best embody the spirit of California. Similarities in their formal quality and the aesthetic of the Californian home can be found- the angular compositional features, sunniness, and unadulterated hues. His paintings also have a casual feel to them because of the relaxed brushwork and loosely-defined forms.
Another artist worth mentioning is David Hockney, whose sleek Pop Art-style paintings exemplify the swanky Californian designer home. His inclusion of modern architectural elements, furniture, and materials like glass makes his work unique and reflective of the socio-economic context. The smooth, flat finish he achieves and the clearly-delineated forms contrast with that of Diebenkorn. I like how he renders interesting surfaces and textures like the rippling, luminous top layer of a swimming pool.