Color Palette for Microsoft Excel in XML:
1. Color Name: Midnight Blue
   Hex Code: 
                            
                            #191970
                        
   Description: A deep and rich navy blue, perfect for headers and accents in Excel.

2. Color Name: Charcoal Gray
   Hex Code: 
                            
                            #36454F
                        
   Description: A dark and sophisticated gray, ideal for backgrounds and borders in Excel.

3. Color Name: Steel Blue
   Hex Code: 
                            
                            #4682B4
                        
   Description: A cool and calming blue shade, great for highlighting and categorizing data in Excel.

4. Color Name: Dark Slate
   Hex Code: 
                            
                            #2F4F4F
                        
   Description: An elegant and versatile slate color, suitable for text and labels in Excel.

5. Color Name: Midnight Black
   Hex Code: 
                            
                            #000000
                        
   Description: A classic and timeless black shade, perfect for text and gridlines in Excel.

6. Color Name: Forest Green
   Hex Code: 
                            
                            #228B22
                        
   Description: A deep and vibrant green hue, ideal for highlighting important information and trends in Excel.