Color Palette:
1. Dark Slate Blue
   - Hex Code: 
                            
                            #483D8B
                        
   - Description: A deep and sophisticated shade of blue, perfect for headers and titles in a professional Excel table.
   
2. Light Gray
   - Hex Code: 
                            
                            #D3D3D3
                        
   - Description: A neutral and modern color that can be used as a background for cells or borders in the Excel table.
   
3. Dark Sea Green
   - Hex Code: 
                            
                            #8FBC8F
                        
   - Description: A muted green tone that adds a touch of freshness and elegance to the table design.
   
4. Silver
   - Hex Code: 
                            
                            #C0C0C0
                        
   - Description: A metallic and sleek color that can be used for gridlines or accents in the Excel table.
   
5. Dark Orange
   - Hex Code: 
                            
                            #FF8C00
                        
   - Description: A bold and eye-catching shade of orange that can be used sparingly for highlighting important data.
   
6. Slate Gray
   - Hex Code: 
                            
                            #708090
                        
   - Description: A cool and understated gray with a hint of blue, ideal for text or subheadings in the Excel table.