A great resource from Hawaii, a customer with a red purse, and surf boards for rent. On the Island of Kawaii we venture ever so often to take in the range of color and shapes of the land. This design below a is dominate vertical composition device with oval shape repetition. The introduction of waving line and varying widths holds this piece together.
Learn everything you can about the pigments in your choice of media. Watercolor, Oils, Gouache, Pastels, Color Pencils, etc. . The pigment character transfers to all medium. Watercolor really shows pigment character simply because all you do is add a sugar for a binder and water to the paint. This will help you design.