Tableau has multiple ways to Rome. Changing background of Highlight is not a feature yet in Tableau.
But You can make use of the Bar Chart , Transparency to achieve your requirement. PFA.
Please check the all Regions Dashboard
Final Output :
1.Add min(1.1) to your Column Shelf,
2.Edit axis and make it fixed End to 1.1
3.Increase the Size of Mark to Maximum
4.Hide axis by deselecting "Show Header" on the axis right click
5.Change Color of Mark to Green
6. Set Transparency to 0.
7. Remove Min(1.1) from Tool tip or you can right click on the min(1.1) pill on view and deselect Include in Tooltip
I just changed the size of view to make it fit to the entire view of the square and hide the Title to look good.
Hope this helps.
Filter Highlight Tableau _1.twbx 53.7 KB