Here’s a revised calm blue color palette with deeper tones that are not too light:

json
{
  "palette_name": "Deep Calm Blues",
  "colors": [
    {
      "name": "Slate Blue",
      "hex_code": "
                            
                            #6A5ACD
                        "
    },
    {
      "name": "Dark Slate Blue",
      "hex_code": "
                            
                            #483D8B
                        "
    },
    {
      "name": "Steel Blue",
      "hex_code": "
                            
                            #4682B4
                        "
    },
    {
      "name": "Cadet Blue",
      "hex_code": "
                            
                            #5F9EA0
                        "
    },
    {
      "name": "Medium Blue",
      "hex_code": "
                            
                            #0000CD
                        "
    }
  ]
}

This palette features deeper blue tones that maintain a calm feel while being more saturated.

Would you like any further adjustments or additional colors?