I'm not aware of a way to make Label backgrounds transparent. One alternative is to use a Canvas widget as the base for the whole thing, then use the create_image
method to add the background image, and create_text
to make the text labels. It will be a bit more work, but the text should render without a background on top of the image. (Admittedly I have very little experience with the Canvas widget, so I'm speaking more from theory than experience, but it's worth a try.)
If you don't have a good Tkinter reference, I highly recommend this one made by New Mexico Tech. It's available as a downloadable PDF as well.
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