The term 'brownish pigment' can refer to a variety of substances, including SIENNA (6 letters), SEPIA (5 letters), UMBER (5 letters), EARTH (5 letters), ocher (5 letters), OCHRE (5 letters), and taupe (5 letters). SIENNA is a reddish-brown EARTH pigment, while SEPIA is a dark brown ink derived from cuttlefish. UMBER is a natural brown or reddish-brown EARTH pigment, and EARTH is a natural pigment composed of clay and other minerals. Ocher and OCHRE are both yellowish-brown pigments, while taupe is a grayish-brown color. All of these substances are used in various art forms, such as painting, drawing, and pottery.