Color Palette:

1. Color Name: Midnight Blue
   Hex Code: 
                            
                            #003366
                        
   Description: Represents strength and stability, ideal for the main background color of the gym app.

2. Color Name: Energy Red
   Hex Code: 
                            
                            #FF0000
                        
   Description: Conveys energy and motivation, suitable for highlighting important elements like buttons or notifications.

3. Color Name: Steel Gray
   Hex Code: 
                            
                            #808080
                        
   Description: Provides a neutral and modern touch, great for text or icons within the app.

4. Color Name: Fresh Green
   Hex Code: 
                            
                            #00FF00
                        
   Description: Symbolizes growth and health, perfect for indicating progress or positive actions.

5. Color Name: Pure White
   Hex Code: 
                            
                            #FFFFFF
                        
   Description: Represents cleanliness and simplicity, suitable for backgrounds or clean design elements.

6. Color Name: Sunshine Yellow
   Hex Code: 
                            
                            #FFFF00
                        
   Description: Radiates positivity and happiness, ideal for adding a pop of color to the app's interface.