Can you style the Node Red editor?

Is there a way to style the editor - eg. put a caption in the title or change toolbar background colour or the flow background? I have multiple instances of Node Red and they all look too similar.

Yes, the editorTheme setting can be used to do various things:

Cool thanks - though it's always disappointing when you think you've Googled it enough, only to find how poor your search skills must be.