Here’s the updated color palette with an additional light gray:

 <Mixed Blues and Pastels with Additional Light Gray>
1. Light Sky Blue - 
                            
                            #A4D8E1
                         - A soft, light blue that evokes tranquility and clarity.
2. Medium Blue - 
                            
                            #3B7A9B
                         - A vibrant yet calming medium blue ideal for data visualization.
3. Dark Blue - 
                            
                            #2A4D69
                         - A rich dark blue that adds depth and contrast to your designs.
4. Navy Blue - 
                            
                            #1B2A49
                         - A deep navy that can ground the palette and enhance readability.
5. Light Lavender - 
                            
                            #E3D7E7
                         - A gentle light purple that adds a touch of creativity without being overwhelming.
6. Dark Purple - 
                            
                            #5D4C8A
                         - A bold dark purple that brings sophistication and depth.
7. Pastel Red - 
                            
                            #F4A6A1
                         - A softer, pastel red that introduces warmth and friendliness to the palette.
8. Pastel Green - 
                            
                            #A8E6CE
                         - A gentle pastel green that enhances the feeling of balance and tranquility.
9. Pastel Orange - 
                            
                            #FFB74D
                         - A warm pastel orange that adds a cheerful touch without being too overpowering.
10. Light Gray - 
                            
                            #D3D3D3
                         - A neutral light gray that provides a calm background for data visualization.
11. Light Silver Gray - 
                            
                            #EAEAEA
                         - A softer light gray that can be used for backgrounds or subtle elements.
12. Dark Gray - 
                            
                            #555555
                         - A deep gray that offers strong contrast and can be used for text or critical elements.

This palette now includes an additional light gray, creating more options for background elements or subtle contrasts while maintaining the overall soft and professional feel.

Would you like to see further adjustments, or do you have specific areas in your dashboard that you want to focus on with these colors?