noun, noun which may take the genitive case particle 'no'
light brown; pale brown
Describes a light or pale brown color, often used for hair, fabric, or natural objects.
彼女は薄茶色の髪をしている。
She has light brown hair.
この薄茶色のセーターが気に入った。
I liked this light brown sweater.
薄い means 'thin' or 'light' in color; 薄茶色 combines this with 茶色 to form a compound color term.
Compound of 薄 (usu-, 'light') + 茶色 (chairo, 'brown').