I know VS Code has a way to do it depending on window color scheme. Not sure if it is supported in Linux, but it is in Windows and MacOS. If your overall OS theme auto-changes based on time of day (or if you manually switch between light and dark mode whenever), VS Code will adjust as well.
In the settings turn on `window.autoDetectColorScheme: true` then select a theme for each: `workbench.preferredLightColorTheme` &
`workbench.preferredDarkColorTheme`
In the settings turn on `window.autoDetectColorScheme: true` then select a theme for each: `workbench.preferredLightColorTheme` & `workbench.preferredDarkColorTheme`