The term 'dark reddish brown' can be described by three words: oxblood (7 letters), UMBER (5 letters), and SEPIA (5 letters). Oxblood is a deep, dark red color, often associated with the color of dried blood. UMBER is a dark brown color, usually made from natural earth pigments. SEPIA is a reddish-brown color, often used to describe the color of ink from cuttlefish. All three colors are shades of dark reddish brown.