Transparent overlay over unused variables and constants

[combdn]

Hey, thanks for the great package.
This is the issue I’ve encountered: overlay becomes transparent when it is located over unused variables and constants (which are greyed out).

[metasong]

this is because the theme or language extension make the unused variable grayed by making it partially transparent. it also makes the text decorator half transparent.

when I have time I would try to find a workaround, for now let keep it as it is.