Colour background on "Note Styles"

Is there a way of selecting own colours for “bubbled Note Style”? There are five different colours in the Note Style list but is there a way of creating your own colour list ? I like to have titles or groups with different colours - preferably more than the five listed. Hope this makes sense and sorry if it has been asked elsewhere.
By the way - love this software. Very handy for planning.

Sorry - think I may have worked it out. Create blank; change background; drag to Styles. Correct me if I’m wrong.

An easy way to edit an existing note style is to make a new note, apply the target style to it, alter the note appearance in whatever way (like changing its background color), then use the appropriate Redefine Note Style menu item to replace the existing style specification with the new one (which you have created by way of example).