Here's a harmonious color palette inspired by your query featuring Forest Green, Ocean Blue, Sandy Beige, and Coral, along with two additional complementary colors to round it out:

### Color Palette: Coastal Forest Harmony

1. **Forest Green**
   - **Hex Code:** 
                            
                            #2C5F2D
                        
   - **Description:** A deep, lush green that evokes the tranquility and vitality of a dense forest.

2. **Ocean Blue**
   - **Hex Code:** 
                            
                            #0077B6
                        
   - **Description:** A rich, vibrant blue reminiscent of the deep ocean, symbolizing depth and calmness.

3. **Sandy Beige**
   - **Hex Code:** 
                            
                            #F4A261
                        
   - **Description:** A warm, soft beige that brings to mind sun-kissed sandy beaches, adding a touch of warmth and neutrality.

4. **Coral**
   - **Hex Code:** 
                            
                            #E76F51
                        
   - **Description:** A lively, warm coral that adds a pop of brightness, reminiscent of vibrant coral reefs.

5. **Moss Green**
   - **Hex Code:** 
                            
                            #8A9A5B
                        
   - **Description:** A muted green with earthy undertones, reflecting the moss-covered ground of a forest floor, which complements both the forest and ocean themes.

6. **Sky Gray**
   - **Hex Code:** 
                            
                            #B0C4DE
                        
   - **Description:** A soft, cool gray with a hint of blue, reminiscent of a clear sky reflecting off the ocean, providing balance to the palette.

### Palette Overview:
This palette, "Coastal Forest Harmony," blends the tranquil and earthy tones of the forest and ocean with warm, inviting colors that capture the essence of nature. The combination of deep greens and vibrant blues with warm sandy and coral hues creates a refreshing yet grounded aesthetic, perfect for designs that aim to evoke a sense of peace and connection to nature.