Set Syntax Coloring Element to "Default"

[Maxpm]

When customizing syntax coloring, how can the foreground/background color of a given element be set to "Default?"  i.e., it will take the value of regular text background/foreground so I don't have to update each element's color every time I want to make my text lighter or darker.

In a new color theme, you can see the text "Default" in some of the elements, and it behaves as expected.  However, I don't see a way to manually set it to that.

Note: I'm not talking about the "Reset defaults" button.  That changes ALL elements to their default values, but I want to set a single element to "Default" so it inherits values.