Here is a monochromatic blue color palette for you:

json
{
  "palette_name": "Monochromatic Blue",
  "colors": [
    {
      "name": "Light Blue",
      "hex_code": "
          
          #A0C4E1
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #4DA8E1
       "
    },
    {
      "name": "Blue",
      "hex_code": "
          
          #1E90FF
       "
    },
    {
      "name": "Dodger Blue",
      "hex_code": "
          
          #1C6DD0
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #0D47A1
       "
    }
  ]
}

This palette features various shades of blue, ranging from light to dark, creating a harmonious and calming effect. Would you like to explore any specific shades further or need assistance with something else?