earth color - a colored mineral used as a pigmentmineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition sienna - an earth color containing ferric oxides; used as a pigment ochre, ocher - any of various earths containing silica and alumina and ferric oxide; used as a pigment pigment - dry coloring matter (especially an insoluble powder to be mixed with a liquid to produce paint etc) |