Certainly! A lighter green can add a fresh and airy feel to the palette while maintaining harmony with the other colors. Here’s an updated version of the palette featuring a lighter green.

 <Innovative Corporate Palette with Lighter Green> 
1. Primary Gold - 
                            
                            #E6B31E
                         - A vibrant and warm gold that represents innovation, luxury, and optimism. Ideal for primary branding elements and call-to-action buttons.
2. Deep Charcoal - 
                            
                            #3C3C3C
                         - A strong, neutral charcoal that conveys professionalism and stability. Suitable for text and backgrounds to balance vibrant colors.
3. Soft Sky Blue - 
                            
                            #A4C8E1
                         - A calming blue that promotes trust and creativity. Use for secondary branding elements, backgrounds, or highlights.
4. Mint Green - 
                            
                            #A8E6CE
                         - A soft and refreshing mint green that symbolizes growth, tranquility, and balance. Perfect for accent elements and to create a light, inviting atmosphere.
5. Warm Coral - 
                            
                            #FF6F61
                         - A lively coral that adds energy and warmth to the palette. Use for accents in promotional materials and to draw attention.

This lighter Mint Green complements the existing colors by adding a softer touch, enhancing the overall freshness of the palette while still aligning with themes of innovation and growth.

Do you have any specific applications in mind for this palette, such as web design, print materials, or branding? Would you like to see additional variations or specific shades of any colors?