The era of 1930 used streamlined colors and opted more for hues for exterior paints. Paint colors varied with different architecture styles. The Tudors and Craftsmen style houses were painted in browns, maroons, deep olives and greens, while the Georgian and Colonial styles mix matched color variation with white, like gray, gray-blue, gray-green, or the like. To learn more about the exterior paint colors and styles of 1930, I recommend California Paints. You will find ample information on their website.