I have a problem very similar to the one in the following topic: Match colors to plot themes. I want to extract the color of a plot for the corresponding legend. However, as I use a RegionPlot I am interested in the color of the region.
However, when I use
Charting`ResolvePlotTheme["Scientific", RegionPlot]
I only get information on the color of the lines between the regions.
Is there a way to extract the color of the regions?

