Sure! Here are three additional color palettes that are cute, trendy, and designed for readability in a spreadsheet format.

 <Bright and Cheerful Palette>
1. Coral Pink - 
                            
                            #FF6F61
                         - A vibrant pink that adds a playful touch, ideal for headers or important notes.
2. Soft Peach - 
                            
                            #FFDAB9
                         - A warm peachy tone that creates a friendly atmosphere, perfect for background sections.
3. Light Teal - 
                            
                            #AFEEEE
                         - A refreshing teal that stands out, ensuring text readability in charts or graphs.
4. Lemon Chiffon - 
                            
                            #FFFACD
                         - A soft yellow that brightens the layout while remaining gentle on the eyes.
5. Pale Lavender - 
                            
                            #E0BBE4
                         - A light lavender that pairs well with other colors, suitable for alternating rows.

 <Pastel Dream Palette>
1. Baby Blue - 
                            
                            #B2E0F0
                         - A soft blue that evokes calmness, great for backgrounds and cells.
2. Pastel Yellow - 
                            
                            #FDFD96
                         - A light and sunny yellow that adds cheerfulness, ideal for highlights.
3. Mint Cream - 
                            
                            #F0FFF0
                         - An ultra-soft mint that provides a subtle backdrop for text.
4. Lavender Mist - 
                            
                            #E5E5E5
                         - A very light gray with a hint of lavender, perfect for maintaining focus on data.
5. Blush Pink - 
                            
                            #FFCCCB
                         - A gentle blush that offers a cute touch while ensuring clarity in text.

 <Vibrant and Modern Palette>
1. Raspberry Red - 
                            
                            #FF007F
                         - A bold red that commands attention, perfect for critical data points.
2. Aqua Blue - 
                            
                            #00BFFF
                         - A bright blue that pops against softer colors, ensuring text stands out.
3. Light Lemon - 
                            
                            #FFEA00
                         - A lively yellow that enhances visibility and highlights key information.
4. Soft Lilac - 
                            
                            #D8BFD8
                         - A light lilac that adds a trendy touch while remaining readable.
5. Creamy White - 
                            
                            #FFFDD0
                         - A warm off-white that serves as a great background for text-heavy sections.

Each of these palettes maintains a balance between cuteness and readability. Do any of these resonate with your vision for the spreadsheet? Would you like to explore specific uses for these colors, or perhaps adjustments to any of the palettes?