Certainly! Here’s the color palette for the minimalist brand logo and marketing materials based on your specifications:

 <Modern Calming Confidence> 
1. Serenity Blue - 
                            
                            #A4C8E1
                         - A soft, calming blue that promotes trust and tranquility.
2. Charcoal Gray - 
                            
                            #4A4A4A
                         - A deep, sophisticated gray that signifies professionalism and stability, ideal for text and secondary elements.
3. Mint Green - 
                            
                            #A8E6CE
                         - A fresh, soothing green that conveys growth and balance, perfect for accents.
4. Warm Sand - 
                            
                            #D9CBAF
                         - A neutral beige that adds warmth and approachability, suitable for backgrounds.
5. Coral Accent - 
                            
                            #FF6F61
                         - A vibrant, yet subdued coral for a touch of energy and creativity, great for highlights.

This palette will provide a modern and professional appearance while ensuring the brand is memorable and approachable.

Would you like to explore any specific applications of these colors further, perhaps in mockup designs or other branding materials?