no transparent with container control

Hi - I can’t seem to get my container control to have a transparent background.
This only happens in windows - on Mac it’s rocking.

I have a container control and on top of that I have a png graphic in a canvas. Even without the canvas overtop, it appears as a white background on my window.
I can assign the backdrop graphic to the CC backdrop - but it still has a white background.
Transparency is set to true - also If I try to runtime that transparent setting, it tells me that this item does not exist


I’m using 2014 r1

any fix for this?

In your container control ensure that “Custom Color” is set to “OFF”.


That totally solved it - thanks so much!