Color metaphor plays a huge role in setting off the atmosphere, depicting the characters, and revealing the significance of the theme. In Dry September, Faulkner used different colors in a metaphorical and symbolic way. The metaphor of different colors implies the abstract human nature. The colors in Dry September are closely related to the thematic meanings of “madness, violence, and death.” By analyzing the metaphorical meanings of the colors, it is then possible to have a better understanding about the profound themes expressed in the short story. However, there are several studies on this short story concerning color metaphor. This paper attempts to analyze the metaphorical meanings represented by the colors in detail to better comprehend the evil side of human nature and the tragedy of life that the author wanted to convey in the short story.