Here’s a revised color palette for a stacked bar chart, featuring less saturated colors that still align with Material Design 3 (Material You) principles, while ensuring a more muted and sophisticated approach.

 <Muted Material Design Stacked Bar Chart Colors>
1. Soft Blue - 
                            
                            #A5C8E8
                         - A gentle blue that conveys calmness.
2. Light Red - 
                            
                            #F5B2B2
                         - A muted red that brings warmth without overwhelming.
3. Sage Green - 
                            
                            #A8D8B9
                         - A soft green that represents tranquility and nature.
4. Mustard Yellow - 
                            
                            #E3B84D
                         - A subdued yellow that adds a touch of cheerfulness.
5. Dusty Lavender - 
                            
                            #D6C5E5
                         - A light lavender that introduces subtle elegance.
6. Warm Peach - 
                            
                            #F8CBA6
                         - A soft peach that gives a warm, inviting feel.
7. Light Teal - 
                            
                            #A0DBD7
                         - A muted teal that balances brightness with calmness.