Color Palette: Earth Day Social Media Poster

1. Color Name: Earthy Green
   Hex Code: 
                            
                            #5B8C5A
                        
   Palette Description: This deep green shade symbolizes the lushness and vitality of nature. It represents the importance of protecting and preserving the Earth's ecosystems.

2. Color Name: Eco Blue
   Hex Code: 
                            
                            #4FA8A4
                        
   Palette Description: This soothing blue hue signifies the oceans and water bodies that cover our planet. It reflects the need for sustainable water management and conservation.

3. Color Name: Sunrise Orange
   Hex Code: 
                            
                            #F47C3C
                        
   Palette Description: This warm, vibrant orange shade represents the energy and optimism associated with Earth Day. It symbolizes the rising sun, highlighting the importance of renewable energy sources.

4. Color Name: Earth Brown
   Hex Code: 
                            
                            #8C6349
                        
   Palette Description: This rich brown color embodies the Earth's soil and land. It symbolizes the need for responsible land use, reforestation, and the protection of natural habitats.

5. Color Name: Clean White
   Hex Code: 
                            
                            #FFFFFF
                        
   Palette Description: This pure white shade represents cleanliness and purity. It signifies the importance of reducing waste, recycling, and maintaining a pristine environment.

6. Color Name: Sustainable Gray
   Hex Code: 
                            
                            #A6A6A6
                        
   Palette Description: This neutral gray color represents sustainability and balance. It reflects the concept of using resources wisely and reducing our ecological footprint.

Note: Feel free to adjust the colors or add more shades to suit your specific design needs.