Although Snowpiercer plays the role of an oppressively gray film at first, more diverse color palettes accompany the progression of the revolution itself. In fact, as the revolution moves toward the front of the train, the colors brighten significantly, which is most clearly illustrated in the class car. The sunny colors and childish decorations of the classroom contrast with the austere grayness of the rest of the train (Snowpiercer). With these changes, Joon-ho opens up the color palette to highlight the class gap that drives the story. When the tail rebels finally encounter the colored sections, their dark clothing stands out against the hyper-saturated environments, allowing the audience to appreciate how dirty they look due to the extreme color contrasts. Because the tail sections seem so out of place with the brighter colors in the center and front sections of the train, Joon-ho specifically draws attention to the extreme disparity between the lower class and everyone else on the social ladder hierarchical. This use of color is actually very similar to Claude's bright yellow clothing ability to stand out against the gray background of the tail; only this time the roles have been reversed, further demonstrating how the harsh rules of class structure are inescapable in such a socially oriented society.