Here is a monochromatic blue color palette based on the color #122660 :

json
{
  "palette_name": "Monochromatic Blue",
  "colors": [
    {
      "name": "Deep Navy",
      "hex_code": "
          
          #122660
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #1A3E8E
       "
    },
    {
      "name": "Medium Blue",
      "hex_code": "
          
          #3A6FB0
       "
    },
    {
      "name": "Light Blue",
      "hex_code": "
          
          #A4C8E1
       "
    },
    {
      "name": "Pale Blue",
      "hex_code": "
          
          #D9E6F2
       "
    }
  ]
}

This palette features a range of blues from deep navy to pale blue, providing a cohesive look for your brand.

Would you like to explore any specific applications for this palette, or do you have any other requests?