Description of the new feature/enhancement

I love the pane of glass look for Terminal. However, when using a dark theme for example in Terminal and the window is in front-of a light colored windows (i.e. Browser with a white page), the text is unreadable in terminal. And when the Terminal is in front of a dark background the text color in Terminal is nice and crisp. What would be great is if the Terminal can detect the underlying window color and dynamically adjust the opacity to ensure the text of the Terminal window remains readable regardless of the window that Terminal is in front of.

Can't read text in Terminal with transparency in front of a light window when using a dark theme. In order to keep the pane of glass look, I need to keep adjusting the transparency setting based on the background colors (background theme and/or window the Terminal is overlaying). New functionality would automatically adjust this or at a minimum provide a hot key to adjust transparency on demand

Proposed technical implementation details (optional)