<Soft Winter Themed Colors for Spreadsheet> 
1. Frosty Blue - 
                            
                            #A8D0E6
                         - A gentle blue that evokes a wintery feel, providing a cool and calming backdrop while being easy on the eyes. 
2. Soft Silver - 
                            
                            #D9D9D9
                         - A light silver-gray that offers a subtle contrast to the blue, perfect for headers and maintaining readability for black text. 
3. Snow White - 
                            
                            #FFFFFF
                         - A clean and bright color that enhances overall clarity and provides a neutral background for data. 
4. Icy Lavender - 
                            
                            #E6E6FA
                         - A light lavender that adds a touch of warmth and festivity without being overpowering, suitable for alternating rows or sections. 
5. Pale Mint - 
                            
                            #B2E3D8
                         - A soft mint green that complements the other colors while maintaining a fresh and inviting appearance. 

This soft winter-themed color palette provides a festive atmosphere while ensuring that black text and hyperlinks remain easily readable. The combination of frosty blue and soft silver can be used effectively for headers and alternating rows.

Would you like to see any specific examples of how to implement this palette in your spreadsheet? Or do you have any other design elements in mind?