Any artist has to continually practice colour mixing. A Very Good Way to do this is to use colours that are next to each other on a colour wheel. Any artist should also make a 72 section colour wheel: this really examines your
colour knowledge and mixing skills. When using colours that are next to each other you can create a harmonised palette, but it can also have the zing of complementary colours just by adding a tint of one of them next to their
complement. A very nice exercise to complete is to look at your colour wheel and divide it equally into three sections: yellows through to red, red through to blue and blue through to green. Use those sections to complete a
study of a landscape as below. A very challenging and worthwhile exercise.