Here’s the updated pastel color palette with a lighter shade of blue and lavender:

 <Calm Music Vibes> 
1. Light Blue - 
                            
                            #B7E3E9
                         - A softer, more pastel blue that evokes feelings of serenity and relaxation, reminiscent of gentle skies and calm waters.
2. Light Lavender - 
                            
                            #E8D0E8
                         - A lighter lavender that enhances the sense of calmness and creativity, often associated with tranquility and reflection.
3. Light Green - 
                            
                            #B2E0B2
                         - A fresh, pastel green that symbolizes growth and harmony, invoking the peacefulness of nature.
4. Peach - 
                            
                            #F6C8B5
                         - A warm, soft peach that adds a gentle touch of vibrancy, complementing the cooler tones and enhancing the overall warmth of the palette.
5. Light Grey - 
                            
                            #D3D3D3
                         - A soft, neutral grey that provides balance and sophistication, grounding the palette while allowing the pastel colors to shine.

This revised palette features lighter shades of blue and lavender, enhancing the calm and soothing vibes while maintaining harmony with the other colors. It should work beautifully for your YouTube channel or banner against a white background.

Would you like any further adjustments, or do you have specific design ideas for how you’d like to use this palette?