ম্যাটপ্লটলিব LinearSegmentedColormap

import matplotlib.pyplot as plt
from matplotlib.colors import LinearSegmentedColormap

cmap = LinearSegmentedColormap.from_list(
    "custom",
    ["blue", "white", "red"]
)

plt.scatter(
    [1, 2, 3, 4],
    [2, 5, 3, 8],
    c=[10, 20, 30, 40],
    cmap=cmap
)

plt.colorbar()

plt.show()