Color Palette:

1. Green
   - Hex Code: 
                            
                            #4CAF50
                        
   - Description: Represents growth and success, perfect for highlighting important data.

2. Yellow
   - Hex Code: 
                            
                            #FFEB3B
                        
   - Description: Adds a pop of brightness and energy, ideal for indicating warnings or alerts.

3. Red
   - Hex Code: 
                            
                            #F44336
                        
   - Description: Signifies urgency and critical information, great for emphasizing important figures.

4. Blue
   - Hex Code: 
                            
                            #2196F3
                        
   - Description: Symbolizes trust and professionalism, suitable for headers and titles.

5. Light Blue
   - Hex Code: 
                            
                            #03A9F4
                        
   - Description: Provides a calming effect, suitable for background colors to reduce eye strain.

6. Dark Blue
   - Hex Code: 
                            
                            #0D47A1
                        
   - Description: Offers a sense of depth and sophistication, ideal for borders and outlines in the spreadsheet.

This color palette of green, yellow, red, and blue tones provides a harmonious blend for an Excel spreadsheet, ensuring clarity and visual appeal for your data visualization needs.