There should be a way to create a colormap starting from a collection of colors. I don't recall whether this is already possible.

Related, Color.InterpolateRgbArray:

Note that similar functionality exists in Python

• https://matplotlib.org/stable/api/_as_gen/matplotlib.colors.ListedColormap.html#matplotlib.colors.ListedColormap
• https://matplotlib.org/stable/api/_as_gen/matplotlib.colors.LinearSegmentedColormap.html#matplotlib.colors.LinearSegmentedColormap