How to set transparent color in figure in Keynote? In Office 2019 Powerpoint, you can click a figure and define a specific color as transparent. You'd go to Picture Format > Color > Set Transparent Color. 

How do I do this in Keynote?

Below is a screenshot from what I do in Powerpoint. I have made the blue transparent.



Thanks in advance
Have you tried selecting the item and clicking the format icon top right?
See image below:



And using Opacity...