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

 <Fitness App Color Palette>
1. Energy Red - 
                            
                            #FF4500
                         - A vibrant red color symbolizing energy and motivation.
2. Fresh Green - 
                            
                            #00FF00
                         - A refreshing green color representing health and vitality.
3. Strong Blue - 
                            
                            #4169E1
                         - A strong blue shade signifying strength and determination.
4. Active Orange - 
                            
                            #FFA500
                         - An active orange hue evoking enthusiasm and action.
5. Balance Grey - 
                            
                            #808080
                         - A balanced grey tone providing a neutral backdrop for other colors.

This color palette combines vibrant shades like Energy Red and Active Orange with calming tones like Fresh Green and Balance Grey to create a dynamic and motivating visual experience for a fitness app. Let me know if you need any further adjustments or additional colors!