Filled Region Color Parameter Value

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Colored surface in view

Hello all, I have a script where I sort pile foundations on bottom and top elevation and give each elevation a color, bottom and top separate of course. So in plan view you can simply check whatever the elevations are correct. Now i need one last step. I want to create a list of colors and elevation values behind it. So each color stands for a elevation, so I want it in a schedule or something. I tried to add an instance image parameter for the pile foundation family, but that parameter can on…