How to tune the title styles in Shipping Rates Calculator+

In Shipping Rates Calculator+, it is possible the tune the title styles on the app preferences page.

These options are visible when you click on the Advanced style options link:

For example, if we set this colour #7796A8:

The title will look similar to this screenshot:

If we resize the text a little and enable the bold text:

The title will look now like this:

It is also possible to enable a horizontal rule below the title:

If this option is enabled the title will look like this:

You can also customise the styles of the title by adding CSS styles here in JSON format: