I created a Text style Custom Metadata and turned on custom text color and chose one.
Didn’t like it and also realized finding a color that is readable in both Dark and Light modes would be an issue so wanted to reset to no custom color. But it stays that color.even with the option unchecked.
Deleted and recreated with the same title, the custom color was still there when I typed in the text in the inspector.
Workaround for now:
Creating a second custom iMeta data title. That fixed the first. And it remained fixed.