Being able to easily adjust a scale of typography opens up some powerful combinations of design. There could be 2 potential ways of doing this.

Declare a base font

Pull base from text

The other option is to have the text size be the base and just scale up from it, simply showing a scale and in conjunction with #21028 show that size.

Wider picture

In the context of global styles this could look like the following picture:

Feedback

As it would be great to move this to development, deciding which approach would be a great step here to continue forward.