Here’s a calm color palette suitable for a tracker, designed to create a serene and organized user experience:

### Calm Colors Palette

1. **Sky Blue**
   - **Hex Code:** 
                            
                            #87CEEB
                        
   - **Description:** A light and airy blue that evokes feelings of tranquility and openness, perfect for backgrounds or large sections.

2. **Soft Mint**
   - **Hex Code:** 
                            
                            #98FF98
                        
   - **Description:** A gentle mint green that symbolizes freshness and balance, ideal for accents or buttons.

3. **Lavender Mist**
   - **Hex Code:** 
                            
                            #E6E6FA
                        
   - **Description:** A very light lavender that adds a subtle touch of color while remaining soft and calming, great for text backgrounds.

4. **Powder Rose**
   - **Hex Code:** 
                            
                            #F4C7D4
                        
   - **Description:** A delicate and muted pink that brings warmth without overwhelming, suitable for highlights or notifications.

5. **Light Sand**
   - **Hex Code:** 
                            
                            #F5F5DC
                        
   - **Description:** A soft beige that provides a neutral base and complements other colors harmoniously, useful for text or borders.

6. **Pale Aqua**
   - **Hex Code:** 
                            
                            #B2E0E0
                        
   - **Description:** A soft aqua that brings a serene feel, perfect for graphs or data visualization elements in the tracker.

### Summary
This palette combines soothing colors that promote calmness and clarity, making it ideal for a tracker that aims to keep users focused and relaxed. The colors can be used in various combinations for backgrounds, accents, and text to enhance usability and aesthetic appeal.