1, chromaticity is different: chestnut color is more inclined to yellow-red, similar to the color of chestnut shells. And chestnut brown is heavier, leaning towards reddish brown, darker than chestnut color.

2, different hues: chestnut color is more inclined to warm tones, with yellow and red components. Chestnut brown is more inclined to reddish brown, with orange components. Chestnut color phase for chestnut brown is more yellow.

3, expressing different emotions: chestnut color gives a warm, elegant feeling, suitable for creating a soft, comfortable atmosphere. Can convey a warm, friendly emotions. Chestnut brown is more calm and introverted, giving a sense of stability, dignified feeling, suitable for creating a formal, solemn atmosphere. It can convey a mature, stable emotion.