Here is a color palette based on your query:

json
{
  "palette_name": "Midnight Blues",
  "colors": [
    {
      "name": "Deep Blue",
      "hex_code": "
          
          #00008B
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #0000CD
       "
    },
    {
      "name": "Navy Blue",
      "hex_code": "
          
          #000080
       "
    },
    {
      "name": "Midnight Blue",
      "hex_code": "
          
          #191970
       "
    },
    {
      "name": "Slate Blue",
      "hex_code": "
          
          #6A5ACD
       "
    }
  ]
}

This palette, “Midnight Blues,” encapsulates various shades of blue that evoke the calmness and depth of the night sky.

Would you like to explore more color palettes or specific shades?