@KeithAddison1 - I think I have a workflow that may work better. In ArcGIS Pro, there is a Favorites style you can use to create new symbols and color schemes. Since you have an existing color scheme that you'd like to make into a style, here's what you can do.
1. In the Contents Pane, click the Color Scheme to open the Symbology Pane.
2. Click the dropdown menu for Color Scheme and then click "Format color scheme..."
3. Bottom left of the Color Scheme Editor, click the "Save to a style..." button.
4. In the "Save Color Scheme As" window, fill in the name, category, tags and select Favorites if not already selected.
5. Click OK twice.
6. Open the Catalog View, then click Styles and Favorite. The recently created color scheme is now part of your Favorites style.