Do you use yellow ochre in your watercolors? Is your pigment categorized on the Color Index as PY43 (natural pigment yellow iron oxide) or PY42 (synthetic yellow iron oxide)? Yellow Ochre pigment is the oldest paint on the planet. It was used in prehistoric times, and it’s still used today to create warm, organic golds, yellows and mixes of earthy rich & complimentary hues. Here’s a six minute primer video (below) about yellow ochre, with sample mixes, and a few watercolors from artists in history that featured earthy & ochre hues. If you don’t see the window below, you can watch the yellow ochre video here.
At present I absolutely want to paint a starry sky. It often seems to me that night is still more richly colored than the day; having hues of the most intense violets, blues and greens. If only you pay attention to it you will see that certain stars are lemon-yellow, others pink or a green, blue and forget-me-not brilliance. And without my expatiating on this theme it is obvious that putting little white dots on the blue-black is not enough to paint a starry sky.
~Vincent van Gogh