Setting the background of a masterdetailpage to be transparent

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When I try to set the background color of the Master (of the MasterDetailPage) to transparent, it stays white.

Basically what I would want to see, is that the color from the detail page is shown through the Master.

FOR EXAMPLE (If the above were true, then the background color of this MasterDetailPage would be red (Yes I know I can just set the background colour as red, but I want it to be transparent))

Click here to view an image of what I mean

What I have tried:

I have tried using BackgroundColor.Transparent