x

[Default Light Modern] のところは使ってる テーマで。

jsonc

    "workbench.colorCustomizations": {
        "[Default Light Modern]": {
            "editorWhitespace.foreground"        : "#eeeeee",
            "editor.lineHighlightBackground"     : "#f0f8ff",
            "editorIndentGuide.background"       : "#eeeeee",
            "editorIndentGuide.activeBackground" : "#dddddd",
        },
    },