Color Palette for a Todo List Application:

1. Color Name: Fresh Mint
   Hex Code: 
                            
                            #66CC99
                        
   Palette Description: A refreshing and soothing shade of green, perfect for highlighting completed tasks or categories.

2. Color Name: Sunny Yellow
   Hex Code: 
                            
                            #FFCC33
                        
   Palette Description: A vibrant and energetic yellow, ideal for highlighting important tasks or adding a pop of color to the user interface.

3. Color Name: Soft Coral
   Hex Code: 
                            
                            #FF6666
                        
   Palette Description: A gentle and calming coral tone, great for indicating overdue or urgent tasks that require immediate attention.

4. Color Name: Serene Blue
   Hex Code: 
                            
                            #3399CC
                        
   Palette Description: A serene and tranquil blue shade, suitable for representing upcoming or scheduled tasks.

5. Color Name: Neutral Gray
   Hex Code: 
                            
                            #CCCCCC
                        
   Palette Description: A neutral and versatile gray hue, perfect for creating a balanced and clean design aesthetic for the application.

6. Color Name: Elegant Lavender
   Hex Code: 
                            
                            #9966CC
                        
   Palette Description: An elegant and sophisticated lavender shade, ideal for adding a touch of elegance to the user interface or highlighting important notes or reminders.

Overall Palette Description: This color palette consists of 6 carefully selected colors that can be used to enhance the visual appeal and usability of a todo list application. The colors range from refreshing greens to vibrant yellows, calming corals, serene blues, versatile grays, and elegant lavenders, providing a well-rounded and harmonious palette for an engaging user experience.