I use adobe color to pick out sets of colors and I wish I could group them easily long-term in Good Notes 5. I would like to see the ability to assign color palette groups to a new notebook and a menu to alter the current palette. The workflow would look like:

I find a set of n hex values to import into good notes
I copy & paste, Good Notes intelligently recognizes a list of hex values and asks if I would like to import.
I accept and see a small box menu that describes “Which Notebooks to Add this Scheme to?”, “What is the name of this scheme?”, “Should there be subgroups to a scheme?”, “Should this list be split into 2 schemes?”

Also a “your color year in review” type of feature. This would involve tracking which colors are used and how often in the various facets of Good Notes. “How often is text used in y color?”, “how often do you count in y color”.