Here’s a color palette based on your specifications, featuring a mix of blues, purples, pastel red, green, orange, and light and dark grays:

 <Mixed Blues and Pastels>
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 - 
                            
                            #F4B6A0
                         - A soft red that introduces warmth and friendliness to the palette.
8. Pastel Green - 
                            
                            #B7E2D8
                         - A soothing pastel green that enhances the feeling of balance.
9. Pastel Orange - 
                            
                            #F4C3B2
                         - A warm pastel orange that adds a cheerful touch.
10. Light Gray - 
                            
                            #D3D3D3
                         - A neutral light gray that provides a calm background for data visualization.
11. Dark Gray - 
                            
                            #555555
                         - A deep gray that offers strong contrast and can be used for text or critical elements.

This palette combines a range of blues and purples, along with soft pastels in red, green, and orange, complemented by light and dark grays for balance and contrast.

Would you like to see any specific combinations or variations? Or do you have certain elements on your dashboard in mind that you want to highlight with these colors?