1. Iron Blue (
                            
                            #2E3D49
                        ) - This deep blue hue is perfect for a data engineering blog, representing the analytical and technical nature of the content. 
2. Steel Grey (
                            
                            #6E7F8D
                        ) - This cool grey complements the Iron Blue perfectly, providing a neutral base for the palette. 
3. Electric Green (
                            
                            #47CACC
                        ) - This bright green adds a pop of color to the palette and represents the innovative and forward-thinking aspects of data engineering. 
4. Dark Slate Blue (
                            
                            #34568B
                        ) - This rich, dark blue adds depth and sophistication to the palette, reflecting the complex and technical nature of data engineering.