<Greyscale with Accent Colors>
1. Charcoal Gray - 
                            
                            #333333
                         - A dark gray that provides a strong base for figures and text, ensuring clarity and legibility.
2. Slate Gray - 
                            
                            #7D7D7D
                         - A medium gray that can be used for secondary elements, adding depth without overwhelming the visuals.
3. Light Gray - 
                            
                            #D3D3D3
                         - A soft, light gray that can serve as a background, enhancing readability while maintaining a clean look.
4. Deep Blue - 
                            
                            #003366
                         - An accent color that can be used sparingly in figures and charts to draw attention to key data points.
5. Neural Green - 
                            
                            #4CAF50
                         - Another accent color that can be used to highlight important findings or trends within the greyscale figures.

This color palette is designed to maintain a professional and cohesive look for a presentation primarily in greyscale, while introducing accent colors that highlight key information effectively.

Are there specific elements within your figures that you want to emphasize with the accent colors?