Color Palette:
1. Color Name: Mint Green
   Hex Code: 
                            
                            #98FF98
                        
   Description: A calming and refreshing shade of green, perfect for a professional and soothing PowerPoint template for a PhD thesis defense.

2. Color Name: Sage Green
   Hex Code: 
                            
                            #9DC183
                        
   Description: A soft and sophisticated green tone that exudes elegance and tranquility, ideal for a polished academic presentation.

3. Color Name: Pale Olive
   Hex Code: 
                            
                            #D1E231
                        
   Description: A subtle and gentle hue of green that adds a touch of warmth and sophistication to the overall color scheme of the PowerPoint template.

4. Color Name: Seafoam Green
   Hex Code: 
                            
                            #71EEB8
                        
   Description: A soft and serene green color reminiscent of the ocean, bringing a sense of peace and harmony to the design of the thesis defense presentation.

5. Color Name: Celadon Green
   Hex Code: 
                            
                            #A9D6B8
                        
   Description: A delicate and soothing green shade that conveys a sense of balance and harmony, creating a harmonious visual experience for the audience.

6. Color Name: Pistachio Green
   Hex Code: 
                            
                            #93C572
                        
   Description: A vibrant yet calming green hue that symbolizes growth and renewal, perfect for adding a touch of energy and positivity to the PowerPoint template for the PhD thesis defense.