Here’s the updated color palette with “Midnight Purple” set to your specified color #22172C :

 <Cultural Nature with Night Sky and Midnight Purple> 
1. Deep Magenta - 
                            
                            #60053e
                         - Represents the client’s preference, evoking creativity and passion.
2. Pencil Yellow - 
                            
                            #e1a100
                         - A warm, vibrant yellow that complements the deep magenta, symbolizing optimism and energy.
3. Parchment Beige - 
                            
                            #f5e3b4
                         - A soft, muted beige that serves as a canvas-like background, reminiscent of aged paper.
4. Leafy Green - 
                            
                            #4caf50
                         - A fresh green representing lush leaves, symbolizing nature and growth.
5. Night Sky Purple - 
                            
                            #4b1f6d
                         - A very dark purple, almost black, suitable for backgrounds and gradients, conveying a mystical and sophisticated feel.
6. Midnight Purple - 
                            
                            #22172C
                         - A deep, dark purple with a subtle richness, providing an intense and elegant contrast for night-themed designs.

This “Midnight Purple” now has a rich, dark quality that complements the other colors beautifully.

How does this updated palette feel for your project? Are there any further adjustments or additional elements you’d like to explore?