vscode/extensions/theme-defaults/themes/dark_defaults.json

{
	"$schema": "vscode://schemas/color-theme",
	"name": "Dark Default Colors",
	"colors": {
		"editorBackground": "#1e1e1e",
		"editorForeground": "#D4D4D4",
		"editorInactiveSelection": "#3A3D41",
		"editorGuide": "#404040",
		"editorSelectionHighlightColor": "#add6ff26"
	}
}