Here’s a muted color palette based on your query, which features softer, less saturated versions of the original colors:

### Muted Color Palette

1. **Soft Sky Blue**
   - **Hex Code:** 
                            
                            #A4C8D4
                        
   - **Description:** A muted, gentle version of the original sky blue, providing a calm and soothing effect.

2. **Dusty Mustard**
   - **Hex Code:** 
                            
                            #D3C26B
                        
   - **Description:** A toned-down yellow with earthy undertones, evoking a sense of warmth and nostalgia without overwhelming brightness.

3. **Pale Ocean Blue**
   - **Hex Code:** 
                            
                            #A0C4D8
                        
   - **Description:** A desaturated blue reminiscent of gentle ocean waves, this color brings a tranquil feel to the palette.

4. **Muted Coral Red**
   - **Hex Code:** 
                            
                            #C24B3C
                        
   - **Description:** A softened red that retains some vibrancy while leaning towards a more subdued, organic appearance.

5. **Off-White**
   - **Hex Code:** 
                            
                            #F7F7F7
                        
   - **Description:** An extremely light grayish-white that adds a touch of brightness while remaining subtle and understated.

6. **Charcoal Black**
   - **Hex Code:** 
                            
                            #4B4B4B
                        
   - **Description:** A muted black with slight gray undertones, offering depth without the starkness of pure black.

### Summary:
This palette is characterized by its calming and earthy tones, making it suitable for designs that require a soft, approachable aesthetic. Each color complements the others, allowing for harmonious combinations in various design applications.