Here’s an updated color palette incorporating a red hue, which adds an element of passion and excitement to the original “Hello World” palette.

 <Hello World Palette with Red>
1. Sunshine Yellow - 
                            
                            #FFEA00
                         - A bright, cheerful yellow that represents positivity and energy.
2. Sky Blue - 
                            
                            #00ADEF
                         - A calming blue that symbolizes clarity and communication.
3. Grass Green - 
                            
                            #4CAF50
                         - A refreshing green that conveys growth and harmony.
4. Warm Gray - 
                            
                            #B0BEC5
                         - A neutral gray that adds balance and sophistication to the palette.
5. Passionate Red - 
                            
                            #E63946
                         - A bold red that signifies energy, passion, and action.
6. Soft White - 
                            
                            #FFFFFF
                         - A clean, pure white that represents simplicity and clarity.

This palette maintains a vibrant and friendly aesthetic while the addition of Passionate Red injects a sense of urgency and enthusiasm, making it ideal for engaging user interfaces.

Would you like to explore any specific applications for this palette, or would you like to add or modify any other colors?