<Solar Energy Sales Calculator with Red Emphasis> 
1. Solar Yellow - 
                            
                            #F6D02F
                         - A bright, cheerful yellow that evokes sunlight and energy.
2. Sky Blue - 
                            
                            #87CEEB
                         - A calm blue reminiscent of clear skies, promoting a sense of trust and reliability.
3. Grass Green - 
                            
                            #4CAF50
                         - A vibrant green that symbolizes growth and sustainability, reflecting the eco-friendly aspect of solar energy.
4. Earthy Brown - 
                            
                            #8B4513
                         - A grounding brown that connects to nature and adds a stable, earthy tone to the palette.
5. Bright Red - 
                            
                            #FF5733
                         - A bold red that signifies urgency or action, perfect for highlighting key information or calls to action.
6. Dark Red - 
                            
                            #C0392B
                         - A richer, darker red that can be used for alerts or important warnings, providing a strong visual cue.
7. Soft Gray - 
                            
                            #D3D3D3
                         - A light gray that adds a modern touch and provides a neutral background to enhance readability.
8. Crimson Red - 
                            
                            #DC143C
                         - A vivid, striking red that can be used for buttons, headers, or highlights to create a sense of urgency and engagement.
9. Cherry Red - 
                            
                            #FF2B2B
                         - A bright, eye-catching red that can be used for critical information or interactive elements requiring immediate attention.
10. Charcoal Black - 
                            
                            #333333
                         - A dark gray that can be used for text and borders to enhance contrast and readability.

This updated color palette significantly enhances the use of red tones, offering three distinct shades—Dark Red, Crimson Red, and Cherry Red—to provide emphasis on critical elements, alerts, and interactions. This approach allows for a strong visual hierarchy and can effectively guide users’ attention to important information.

How do you plan to utilize these various shades of red in your calculator? Are there particular features or user interactions that you want to highlight with this emphasis?