Sure! Here is a color palette for a fitness app:

 <Fitness App Color Palette>
1. Energy Red - 
          
          #FF1744
        - Represents passion and intensity in workouts
2. Active Blue - 
          
          #2196F3
        - Symbolizes motivation and focus during exercise
3. Fresh Green - 
          
          #4CAF50
        - Evokes feelings of vitality and health
4. Strong Black - 
          
          #212121
        - Provides a sleek and modern touch to the design
5. Vibrant Yellow - 
          
          #FFEB3B
        - Adds a pop of color for positivity and optimism
6. Calm Gray - 
          
          #9E9E9E
        - Balances the palette with a sense of stability and neutrality