Chestnut and Yellow-brown

Chestnut adjective - (of hair or feathers) of a golden brown to reddish brown color.

Yellow-brown and chestnut are semantically related. In some cases you can use "Yellow-brown" instead an adjective "Chestnut".

Yellow-brown adjective - Of a medium to dark brownish yellow color.

Chestnut and yellow-brown are semantically related. Sometimes you can use "Chestnut" instead an adjective phrase "Yellow-brown".