Here is how to change background border color of a funnel chart in looker studio
- First click on the file name from the reports list to open it
- Then click on "Edit" button in the top toolbar
- Next click on "Manage pages" option in the page navigation toolbar
- Next click on the page name that you want to manage in the right sidebar
- Next click on the "Show properties" button above the table chart
- Then click on "Border radius" dropdown in the Background and border section of the right properties panel
- Finally click on a color option in the Border color picker palette








