Progress Bar Visibility

In a large file set, I’m using process bars in a number of places and they provide a great visual feedback that work is being done. Recently I was running the files on Catalina and thought the progress bar was failing to work. It appeared to be just a solid color. Eventually I discovered that it was working but that the highlight moving back and forth was almost identical to the rest of the bar and barely discernible.

Aside from the Highlight and Accent colors set in the System Settings> Appearance, is there something else tat effects the progress bar?

Not that I am aware of.