Formatting Options in JSON File

[WishAskedSooner]

Based on my research of similar questions asked on this forum, there is no way to custom format the color of a selected tile nor the checkbox in a slicer. Therefore, my question is:

Does the JSON file provide exposure to every element of a visual e.g. the color of the selected tile in a slicer? Or, does the JSON file only expose the formatting that is currently available in the Visualizations pane anyway?

So, basically, how far can we take our custom visualization formatting using JSON? What are the limitations? Etc.

Thanks in advance