Color rhythm is a core element in digital animation that connects visual language with emotional narrative.Although current animated works are rich in color, the use of rhythm is often weakened, making it difficult to play an effective role. Color rhythm not only affects the tension of the picture but also guides the audience's emotional rhythm through dynamic changes, resonating with the plot. In digital animation, the narrative function of color rhythm should be emphasized. By constructing rhythm sequences, designing flowing colors, integrating visual tension, and multi-media interaction, the depth and expressiveness of emotional expression can be enhanced. The effective use of color rhythm is an important breakthrough for digital animation to achieve high-quality emotional communication.