I will watch the video, I am currently wondering if I could use just three values, each corresponding to a color (red, blue green), so that generates an rgb color. I would find it easy to see a colored square next to any movement or organization.

Perhaps the first is how socialist (red scale), the second is how free ( blue scale) and the third is how centralized power would be (green scale). 0-255 each value

Edit: But I think the three variables would need to be chosen more carefully to be truly independent of each other. Too much interdependence between socialism and freedom for example