Liquitex Heavy Body acrylic paints (previously called "High Viscosity" paints) are a joy to work with. They are thick, smooth, and rich, with vibrant hues. They can be used for conventional brush painting or applied with a knife, and they work just as well on a panel as they do on canvas. The paints also work beautifully for block printing and can inspire new, experimental techniques.
Raw umber is a rich brown. It is one of humanity's oldest pigments, and has even been discovered in cave paintings. It was a crucial pigment for painters such as Vermeer, Rembrandt, and Caravaggio.
Liquitex paints are professional quality, but will enhance the work of painters at all levels. If you haven't tried them before, you owe it to yourself to try them now. You will be delighted with the rich vibrancy of the raw umber.