At first I wanted the Preset colours to be linked to a document.
Because I don't use the same colour for my pro notes depending on the client / subject.

Then I realised that it wasn't much helpful neither since you change subject / colour style at least twice a day and you have to reset them every time you create a new notebook.

The easier solution would be to have different palettes (see attached doc) with different Names :
- a palette for my meetings with clients,
- another for my night courses
- another for my diary...

and then I choose a palette when creating a new notebook and can change whenever I want !