I like the beach, in case you haven’t noticed. Grass, sand, cliffs, water, wind.
Of course, I did it on an accessible page in my sketchbook, but since I did the study before the painting, I knew where I wanted lights and darks. As I worked, I pulled dark areas together to contrast with lighter / brighter areas. I mixed my colors using zinc white, but this time used titanium white straight out of the tube to highlight the ocean waves.
I’ve been wondering why people say “zinc for mixing, titanium for highlights.” Zinc is a transparent white, so it blends with gouache and watercolors without distorting the values. Titanium is a more opaque white, and as a result good for highlights, but not recommended for color mixing.