<Excel Shades Palette> 
1. Light Blue - 
                            
                            #A4C8E1
                         - A soft, calming blue that promotes a sense of tranquility. 
2. Sky Blue - 
                            
                            #87CEEB
                         - A bright and cheerful blue reminiscent of a clear sky. 
3. Deep Blue - 
                            
                            #1F4E79
                         - A strong, professional blue that conveys stability and trust. 
4. Teal - 
                            
                            #008080
                         - A mix of blue and green that adds a refreshing touch. 
5. Light Green - 
                            
                            #A8D5BA
                         - A gentle green that creates a sense of balance and harmony. 
6. Lime Green - 
                            
                            #B3D94C
                         - A vibrant, energetic green that evokes freshness. 
7. Dark Green - 
                            
                            #2E5B30
                         - A deep green that symbolizes growth and reliability. 
8. Light Yellow - 
                            
                            #F6EB61
                         - A soft yellow that brings warmth and positivity. 
9. Bright Yellow - 
                            
                            #FFEA00
                         - A bold, sunny yellow that captures attention. 
10. Light Orange - 
                            
                            #FFA07A
                         - A warm, inviting orange that feels friendly and approachable. 
11. Dark Orange - 
                            
                            #FF8C00
                         - A rich, vibrant orange that adds energy and excitement. 
12. Light Red - 
                            
                            #FFB6C1
                         - A soft, romantic red that feels gentle and inviting. 
13. Bright Red - 
                            
                            #FF0000
                         - A strong, passionate red that is bold and attention-grabbing. 
14. Pink - 
                            
                            #FF69B4
                         - A playful pink that conveys fun and creativity. 
15. Light Purple - 
                            
                            #E6E6FA
                         - A soft, soothing purple that adds a touch of elegance. 
16. Lavender - 
                            
                            #DDA0DD
                         - A light purple with a floral feel, bringing a sense of calm. 
17. Deep Purple - 
                            
                            #4B0082
                         - A rich, royal purple that conveys luxury and sophistication. 
18. Light Gray - 
                            
                            #D3D3D3
                         - A neutral gray that provides a subtle backdrop. 
19. Dark Gray - 
                            
                            #A9A9A9
                         - A more pronounced gray adding depth and professionalism. 
20. Brown - 
                            
                            #8B4513
                         - A warm, earthy brown that conveys reliability and stability. 
21. Black - 
                            
                            #000000
                         - A classic black that symbolizes elegance and formality. 

This color palette includes a diverse range of shades suitable for Excel, ensuring clarity and visual appeal. Each color has been chosen to provide good contrast while maintaining a professional and modern aesthetic.

What specific use case do you have in mind for these shades in Excel? Would you prefer any particular color themes or combinations?