is there a way to colorize only a part of the graph? I would like to define a point not only with a key and a value but also with a color. When the Graph is drawn the color, stored in each point should be used for the lines (interpolated).

I know that it is possible to simply draw a new Graph in the desired color on top, but this is not a nice solution.
Before I override all needed functions I wanted to ensure that I didn't miss anything and that there is still no easy solution to handle this problem.

Thank you