Color Palette: Scientific Paper

1. Group 1 (5 categories):
   - Color name: Deep Blue
   - Hex code: 
                            
                            #001F3F
                        
   - Description: Represents the first group with multiple categories, conveying depth and complexity.

2. Group 2 (2 categories):
   - Color name: Steel Gray
   - Hex code: 
                            
                            #6C757D
                        
   - Description: Reflects the second group with fewer categories, conveying precision and neutrality.

3. Group 3 (4 categories):
   - Color name: Moss Green
   - Hex code: 
                            
                            #5C946E
                        
   - Description: Symbolizes the third group with multiple categories, evoking a natural and harmonious feel.

4. Group 4 (2 categories):
   - Color name: Rich Gold
   - Hex code: 
                            
                            #B08900
                        
   - Description: Represents the fourth group with a touch of opulence and distinction, adding a touch of sophistication to the palette.

This palette provides a balanced and cohesive set of colors for the diverse categories within the scientific paper, ensuring visual clarity and distinction for each group.