settings.json Ctrl+,

"editor.tokenColorCustomizations": {
    "textMateRules": [{
        "scope": "punctuation",
        "settings": {
            "foreground": "#ffffff"
        }
    }]
}

https://code.visualstudio.com/docs/extensions/themes-snippets-colorizers#_textmate-theme-rules

https://www.sublimetext.com/docs/3/scope_naming.html