Sublime text color scheme customization

I have installed Sublime Text 4. The default color scheme is Mariana. I like it, but I don’t like how the Dollar symbol behaves in php:

Mariana $ behaviour

I would like to have the $ with the same colour of the name that follows.

I tried with this custom setting:

            "name": "Language variable",
            "scope": "variable.language",
            "foreground": "var(orange)",
            "font_style": "italic"
            "name": "Punctuation",
            "scope": "punctuation.definition - punctuation.definition.numeric.base",
            "foreground": "var(orange)"

the result is:
custom Mariana

I read the Sublime docs but I can’t find a way to make the highlited variable name orange.