Using VS Code Remote Development (SSH, container, WSL) I want a different theme on my remote and local VS Code windows so that I can easily tell them apart.
You can set your theme in remote settings to use a different theme for that specific remote, open up the command palette (F1) and run the "Open Remote Settings" command:
Then add the following setting and save:
{
"workbench.colorTheme": "<your theme of choice>"
}
Or if you're using the settings editor:
There is currently no way to do this all at once for all remotes, it must be configured per machine.