Here’s a completely different pastel color palette that avoids purples and pinks altogether:

 <Fresh Pastel Color Palette for Excel>
1. Sky Blue - 
                            
                            #A7D3E0
                         - A bright and airy blue that evokes openness and freedom.
2. Pale Mint - 
                            
                            #C3E6D4
                         - A light mint that conveys freshness and tranquility.
3. Butter Yellow - 
                            
                            #F6E8A8
                         - A soft buttery yellow that adds warmth and cheerfulness.
4. Soft Coral - 
                            
                            #F1B2A1
                         - A gentle coral that brings a touch of warmth and friendliness.
5. Light Gray - 
                            
                            #D7D9D7
                         - A soft light gray that offers a modern and neutral balance.

This palette combines refreshing and soft colors that are distinct from one another, ensuring good visibility and readability with black text in your Excel sheet.

Would you like to see any other color themes, or do you have specific colors in mind for this palette?