Great! Here’s another color palette that offers a different aesthetic while still maintaining professionalism and clarity, which can be suitable for your flowchart.

 <Modern Tech Vibes>
1. Deep Indigo - 
                            
                            #6610F2
                         - A rich indigo that conveys sophistication and innovation, great for highlighting key components.
2. Teal Blue - 
                            
                            #20C997
                         - A cool teal that represents efficiency and calmness, ideal for indicating smooth processes.
3. Warm Coral - 
                            
                            #FF6F61
                         - A warm coral that adds a friendly touch and is excellent for emphasizing important actions or tasks.
4. Slate Gray - 
                            
                            #343A40
                         - A dark gray that provides a strong foundation and contrast, useful for text and secondary elements.
5. Soft Beige - 
                            
                            #F8F9FA
                         - A light beige that gives a gentle background, ensuring that all other colors stand out while maintaining a soft look.

This palette leans towards a more modern and tech-oriented feel, making it suitable for a contemporary presentation of the machine learning pipeline.

Would you like to see additional palettes, or do you have requests for specific elements in your design, such as font styles or iconography?