ggplot color scheme

Quick answer：

ggplot is a powerful and flexible data visualization package for R. Its color schemes are designed to enhance the readability and interpretability of plots. Some common ggplot color schemes include 'viridis', 'plasma', 'inferno', 'magma', and 'cividis'. These schemes are designed to be perceptually uniform, meaning that they maintain consistent color intensity and contrast across the color spectrum.