The term 'yellowish-brown color' can be described by three different crossword solutions: UMBER (5 letters), ECRU (4 letters), and Isabel (6 letters). UMBER is a dark yellowish-brown color, often used in oil paints and pastels. ECRU is a lighter shade of yellowish-brown, often used in fabrics and yarns. Isabel is a medium shade of yellowish-brown, often used in interior design. All three colors are variations of the same hue, and can be used to describe the term 'yellowish-brown color'.