**Color Palette for Excel Tool to Calculate Building Carbon Emission**

**Palette Description:** This color palette is designed to visually represent a carbon emission calculation tool, combining earthy tones with vibrant accents to symbolize sustainability and data clarity. The colors are chosen to reflect environmental themes while ensuring high visibility and readability in an Excel format.

1. **Eco Green**
   - **Hex Code:** 
                            
                            #4CAF50
                        
   - **Description:** A vibrant green representing growth, sustainability, and a commitment to reducing carbon emissions. 

2. **Sky Blue**
   - **Hex Code:** 
                            
                            #2196F3
                        
   - **Description:** A bright blue that symbolizes clean air and environmental awareness, creating a refreshing contrast against the greens.

3. **Earth Brown**
   - **Hex Code:** 
                            
                            #795548
                        
   - **Description:** A warm brown that reflects the earth and natural materials, grounding the palette in themes of sustainability and ecological balance.

4. **Sunset Orange**
   - **Hex Code:** 
                            
                            #FF9800
                        
   - **Description:** A bold orange that brings energy and attention, ideal for highlighting key data points related to emissions.

5. **Carbon Gray**
   - **Hex Code:** 
                            
                            #9E9E9E
                        
   - **Description:** A neutral gray that represents carbon emissions, providing a subtle backdrop for analysis without overwhelming other colors.

6. **Vibrant Yellow**
   - **Hex Code:** 
                            
                            #FFEB3B
                        
   - **Description:** A bright yellow that conveys optimism and innovation, perfect for drawing attention to significant findings or areas for improvement.

This palette can enhance the user experience of your Excel tool, making data interpretation intuitive and visually engaging while emphasizing the importance of carbon emission calculations in building design and management.