Color Palette for Gantt Chart:
1. Steel Blue
   - Hex Code: 
                            
                            #4682B4
                        
   - A cool and professional shade of blue, perfect for representing tasks in a Gantt chart.

2. Light Slate Gray
   - Hex Code: 
                            
                            #778899
                        
   - A subtle and versatile gray color that can be used for background elements in a Gantt chart.

3. Dark Sea Green
   - Hex Code: 
                            
                            #8FBC8F
                        
   - A calming green tone that can signify progress or completed tasks in a Gantt chart.

4. Goldenrod
   - Hex Code: 
                            
                            #DAA520
                        
   - A vibrant and attention-grabbing color that can be used to highlight important milestones in a Gantt chart.

5. Lavender
   - Hex Code: 
                            
                            #E6E6FA
                        
   - A soft and soothing shade of purple that can add a touch of elegance to a Gantt chart design.

6. Salmon
   - Hex Code: 
                            
                            #FA8072
                        
   - A warm and inviting color that can be used to emphasize critical tasks or deadlines in a Gantt chart layout.