Give the current line a visible highlight in every theme

default/themed/vscode-theme.json.tpl

@@ -230,8 +230,8 @@
         "searchEditor.findMatchBackground": "{{ yellow }}40",
         "searchEditor.findMatchBorder": "{{ yellow }}",
         "editor.hoverHighlightBackground": "{{ accent }}20",
-        "editor.lineHighlightBackground": "{{ background }}60",
-        "editor.lineHighlightBorder": "{{ background }}00",
+        "editor.lineHighlightBackground": "{{ mix background foreground 6% }}",
+        "editor.lineHighlightBorder": "{{ mix background foreground 30% }}",
         "editorLink.activeForeground": "{{ blue }}",
         "editor.rangeHighlightBackground": "{{ accent }}10",
         "editor.rangeHighlightBorder": "{{ accent }}20",