Here's a pastel color palette based on your query, featuring shades of grey, olive, and beige:

### Pastel Colors Palette

1. **Pastel Olive**
   - **Hex Code:** 
                            
                            #C4D6B0
                        
   - **Description:** A soft and muted olive green that brings a sense of calmness and nature to the palette.

2. **Pastel Beige**
   - **Hex Code:** 
                            
                            #E9D6C2
                        
   - **Description:** A light and creamy beige that adds warmth and a neutral balance to the palette.

3. **Pastel Grey**
   - **Hex Code:** 
                            
                            #D1D3D4
                        
   - **Description:** A gentle, soft grey that provides a sophisticated and modern touch to the color combination.

4. **Soft Sage**
   - **Hex Code:** 
                            
                            #B7C9A8
                        
   - **Description:** A light, muted sage green that introduces a refreshing and organic feel to the palette.

5. **Dusty Rose**
   - **Hex Code:** 
                            
                            #EAB8C9
                        
   - **Description:** A delicate and muted rose that adds a touch of femininity and warmth to the overall palette.

6. **Pale Mint**
   - **Hex Code:** 
                            
                            #B3E3D9
                        
   - **Description:** A soft pastel mint that brings a light and airy quality, complementing the other colors beautifully.

### Palette Overview
This pastel color palette combines earthy and muted tones, creating a soothing and harmonious aesthetic. The inclusion of grey, olive, and beige grounds the palette, while the soft sage, dusty rose, and pale mint add a gentle touch of color, making it perfect for designs that aim to evoke calmness and serenity.