<Excel Blue and Purple Theme>
1. Light Blue - 
                            
                            #AEEEEE
                         - A soft and refreshing blue that provides a calming effect, ideal for backgrounds.
2. Royal Blue - 
                            
                            #4169E1
                         - A vibrant and bold blue that stands out for headings and important data.
3. Lavender - 
                            
                            #E6E6FA
                         - A delicate and light shade of purple that offers a gentle contrast without overwhelming.
4. Medium Purple - 
                            
                            #9370DB
                         - A rich, moderate purple that adds sophistication and depth to charts and graphs.
5. Light Gray - 
                            
                            #D3D3D3
                         - A neutral light gray that can be used for borders or to demarcate different sections.

This color palette is designed to create a professional yet approachable aesthetic for Excel documents, leveraging light backgrounds complemented by blue and purple tones. The use of blues provides clarity and trust, while the purples add a touch of creativity and elegance.

Would you like any specific variations of these colors, or perhaps additional colors for accent or highlight purposes?