<Dark Green Accent Palette>
1. Deep Jungle Green - 
                            
                            #004B3D
                         - A rich, dark green that evokes the mysterious depths of the jungle, symbolizing adventure and exploration.
2. Forest Pine - 
                            
                            #2C3E50
                         - A dark, muted blue-green that conveys professionalism and sophistication, perfect for corporate branding.
3. Evergreen - 
                            
                            #2E5D34
                         - A deep, vibrant green that represents growth and renewal, ideal for showcasing innovation and freshness.
4. Charcoal Black - 
                            
                            #1C1C1C
                         - A solid black that provides a strong contrast, enhancing readability and adding a modern edge.
5. Light Mint - 
                            
                            #98FF98
                         - A soft mint green that brightens the palette, providing a fresh and inviting touch for accents or highlights.

This dark green accent palette combines deep shades of green with contrasting colors to create a balanced and professional look. It conveys a sense of innovation, growth, and trust, which is essential for a marketing agency.

What specific elements of your branding do you want to enhance with this palette? Are there particular design styles or themes you have in mind for your marketing agency?