Here’s the updated pastel color palette with all colors deepened for better visibility while maintaining a calm vibe:

 <Calm Music Vibes> 
1. Soft Blue - 
                            
                            #7AC6D9
                         - A deeper, soothing blue that retains a tranquil quality, reminiscent of a clear sky at dusk.
2. Soft Lavender - 
                            
                            #D49DD2
                         - A richer lavender that enhances the sense of calmness and creativity, offering a more pronounced touch of tranquility.
3. Mint Green - 
                            
                            #5BBE9B
                         - A slightly darker mint green that remains fresh and vibrant, symbolizing renewal and harmony.
4. Warm Peach - 
                            
                            #F2B2B1
                         - A deeper peach that adds warmth and comfort, harmonizing beautifully with the other colors.
5. Light Grey - 
                            
                            #B0B0B0
                         - A medium grey that provides a solid balance and sophistication, grounding the palette while allowing the pastel colors to shine.

This palette features darker tones for better contrast, making the colors more visible and impactful while still retaining a calming aesthetic suitable for your YouTube channel or banner.

Would you like any further modifications, or do you have specific design ideas in mind for how to implement this palette?