如何匹配R中多个ggplot2图表中的调色板？

It's been a while since this was asked, but I know for a fact that I will be pulling new data soon and I would like to figure out how to plot it with this technique. It looks like the people in the comments and answers had an idea of how this could be don, but I couldn't quite figure it out with what was given to me. Anyone else want to take a crack at it?It's been a while since this was asked, but I k