Color Palette:

1. Color Name: Sunbeam Yellow
   Hex Code: 
                            
                            #FFD700
                        
   Description: Represents the bright and powerful sun, symbolizing renewable solar energy.

2. Color Name: Turbine Green
   Hex Code: 
                            
                            #4CAF50
                        
   Description: Symbolizes the sustainable wind energy generated by wind turbines.

3. Color Name: Retro Blue
   Hex Code: 
                            
                            #2196F3
                        
   Description: Adds a touch of vintage charm inspired by mid 1950s poster designs.

4. Color Name: Pure White
   Hex Code: 
                            
                            #FFFFFF
                        
   Description: Represents cleanliness and purity, reflecting the concept of clean energy.

5. Color Name: Eco-Friendly Green
   Hex Code: 
                            
                            #00C853
                        
   Description: Signifies environmental sustainability and harmony with nature, perfect for a clean energy conference poster.