Sure, here's a color palette with two duo colors for notes:

1. Color Name: Midnight Blue
   Hex Code: 
                            
                            #191970
                        
   Description: A deep and calming blue, perfect for creating a serene and introspective atmosphere in note-taking.

2. Color Name: Sunflower Yellow
   Hex Code: 
                            
                            #FFD700
                        
   Description: A bright and cheerful yellow, ideal for adding a pop of energy and warmth to your notes.