auburn

赤褐色的、红褐色的多用于形容头发

She has thick auburn hair that shines in the sunlight.

她有一头浓密的赤褐色头发，在阳光下闪闪发亮。

赤褐色、红褐色

He dyed his beard a deep auburn last winter.

去年冬天他把胡子染成了深赤褐色。