Here is a monochromatic blue color palette:

json
{
  "palette_name": "Monochromatic Blue",
  "colors": [
    {
      "name": "Light Blue",
      "hex_code": "
          
          #ADD8E6
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #87CEEB
       "
    },
    {
      "name": "Dodger Blue",
      "hex_code": "
          
          #1E90FF
       "
    },
    {
      "name": "Royal Blue",
      "hex_code": "
          
          #4169E1
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #00008B
       "
    }
  ]
}

This palette features a range of blue shades from light to dark, creating a harmonious and calming monochromatic effect. Would you like to explore any specific applications for this palette, or do you need further assistance?