Here’s a calm blue color palette for you:

json
{
  "palette_name": "Serene Blues",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #A4C8E1
                        "
    },
    {
      "name": "Powder Blue",
      "hex_code": "
                            
                            #B0E0E6
                        "
    },
    {
      "name": "Light Steel Blue",
      "hex_code": "
                            
                            #B0C4DE
                        "
    },
    {
      "name": "Cadet Blue",
      "hex_code": "
                            
                            #5F9EA0
                        "
    },
    {
      "name": "Steel Blue",
      "hex_code": "
                            
                            #4682B4
                        "
    }
  ]
}

This palette features gentle and tranquil shades of blue, perfect for creating a calm atmosphere without being too bright.

Would you like more options, or do you have a specific application in mind for this palette?