Description: The process of changing the colors of an existing graph in data visualization libraries, such as Matplotlib, is known as ‘recoloring’. This procedure allows users to customize the appearance of their visualizations, enhancing the clarity and aesthetics of the presented data. Recoloring involves not only selecting specific colors but also applying color palettes that can highlight different aspects of the data, such as trends, groupings, or outliers. Users can modify the colors of lines, markers, bars, and areas, giving them complete control over the visual representation of their graphs. This customization capability is essential for creating effective visualizations, as colors can influence data interpretation and viewer attention. Additionally, using appropriate colors can enhance accessibility, allowing individuals with visual impairments to better understand the presented information. In summary, recoloring is a powerful tool that enables users to tailor their graphs to their specific needs, improving both data communication and the visual experience for the viewer.