That's one point I don't understand: why are global colours document specific not application specific – I mean they are GLOBAL, like globally available.
I have done like you said: export document palette as template. But when I open file->new->template, it is grayed out, cannot be selected.
Howdy! That's it! And this even makes sense because colour definitions are specific for the choosen color format. Thank you!
I still find the usability very confusing. E.g. why not make the right mouse button in the colour box open options to delete / rename / create a new color? Using the burger menu all the time with all the other options is very counter intuitive. Many other things have a awkward look & feel and made me close Designer often being frustrated. Why the hell don't the developers just make it the way it is common sense after years and years of people working with graphic programs like Corel or Illustrator? No need to invent the wheel once again!
Anyway, thanks everyone for their quick replies and help.