Groovy color scheme for GStrings does not apply background color to interpolation fragments

Hi,

I'm trying to configure my Groovy color scheme in such a way that any GString gets a slight background color to make it easier to identify. However, any interpolation fragments remain in their regular white background color. From what I can tell, it uses the "Default text" background color from the "General" color scheme (which defaults to white).

Changing the default text background to another color also seems to apply to the interpolation fragments.

Is there any way to make the interpolation fragments have the same background color as the rest of the GString? See attached example for what it looks like now:

I don't want to change the default text background color, because that will apply to pretty much everything; I just want to change the Groovy GString background (in its entirety).

Cheers,

Robin