Color Palette:
1. Color Name: Midnight Blue
   Hex Code: 
                            
                            #0d1b2a
                        
   Description: A deep, rich blue resembling the night sky, perfect for a dark mode calendar background.

2. Color Name: Slate Gray
   Hex Code: 
                            
                            #4a6572
                        
   Description: A muted, cool gray that complements the dark blue and adds depth to the palette.

3. Color Name: Teal
   Hex Code: 
                            
                            #0d9488
                        
   Description: A vibrant greenish-blue that adds a pop of color and visual interest to the palette.

4. Color Name: Steel Blue
   Hex Code: 
                            
                            #4863a0
                        
   Description: A steely, muted blue that can be used for highlights or accents in the calendar design.

5. Color Name: Charcoal
   Hex Code: 
                            
                            #36454f
                        
   Description: A dark, neutral gray that can be used for text and borders in the calendar interface.

6. Color Name: Dark Purple
   Hex Code: 
                            
                            #3c1642
                        
   Description: A deep, luxurious purple that adds a touch of elegance and sophistication to the palette.