Interesting, I'd not played with ArcGIS that much. The most legible option I found was the "light grey canvas" map. Personally I find all the extra detail on

Interesting, I'd not played with ArcGIS that much. The most legible option I found was the "light grey canvas" map. Personally I find all the extra detail on these map layers unwanted and distracting for a chloropleth. This is what I've come up with from scraping the JHU aggregation: https://i.imgur.com/jptdqzs.png https://i.imgur.com/jptdqzs.png