A selection made on CountryName should not affect the values of graph 2, and I think I have that operating correctly. The problem is when I am coloring by dimension and make a selection on CountryName. Graph 2 colors drop off, but the numbers and dimension values remain. Am I using the wrong dimension or possibly the incorrect background color formula?
As an aside, I was curious if there's a way to have the same coloring functionality, but with Island.Country as the dimension instead of CountryName. There is still dependency between the two if I make a selection within the bottom chart, since it uses the original CountryName field.