Color Palette for IT Architecture Diagrams:

1. Color Name: Deep Blue
   Hex Code: 
                            
                            #002366
                        
   Description: A deep, rich blue for highlighting important components or connections in the diagram.

2. Color Name: Sky Blue
   Hex Code: 
                            
                            #5EB6E4
                        
   Description: A calming and serene blue for indicating cloud-based elements or virtual components.

3. Color Name: Graphite
   Hex Code: 
                            
                            #333333
                        
   Description: A dark graphite shade for outlining and emphasizing the structure of the architecture.

4. Color Name: Azure
   Hex Code: 
                            
                            #007FFF
                        
   Description: A vibrant azure hue representing modern technology and innovation within the architecture.

5. Color Name: Teal
   Hex Code: 
                            
                            #008080
                        
   Description: A refreshing teal color to denote communication or networking aspects in the diagram.

6. Color Name: Steel Blue
   Hex Code: 
                            
                            #4682B4
                        
   Description: A cool and professional steel blue for indicating security measures or data protection.

7. Color Name: Cobalt
   Hex Code: 
                            
                            #0047AB
                        
   Description: A bold and dynamic cobalt shade for highlighting critical infrastructure components.

8. Color Name: Royal Blue
   Hex Code: 
                            
                            #4169E1
                        
   Description: A regal royal blue for representing key strategic elements or decision points.

9. Color Name: Midnight Blue
   Hex Code: 
                            
                            #191970
                        
   Description: A deep midnight blue ideal for adding depth and dimension to the architecture diagram.

10. Color Name: Electric Blue
    Hex Code: 
                            
                            #7DF9FF
                        
    Description: An electrifying blue shade symbolizing cutting-edge technology and digital transformation.

This palette offers a range of blues to convey different aspects of IT architecture, from security to innovation, and can be used to create visually appealing and informative diagrams.