Hey @julien.terrier3 ,
We do not plan on exposing the source code of our widgets.
However, we are constantly trying to improve the customization capabilities of widgets, and adding a color configuration for the background of the Cylinder widget does sound like a good idea.
Keep in mind that there are a bunch of widgets that already have this background color configuration, such as the Tile and Card widgets. Those may suit your needs.
You could also create a Custom widget that would have your own source code and logic.
I can’t promise that we’ll add this configuration, but I’ll talk to our team about it.