Here is a stepped palette that showcases shade variations leading to the original color #003b76 . This palette gradually transitions from very dark to lighter shades of blue. Here is the JSON representation of the color palette:

json
{
  "palette_name": "Stepped Shades of Deep Blue",
  "colors": [
    {
      "name": "Very Dark Blue",
      "hex_code": "
          
          #001f4d
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #002a57
       "
    },
    {
      "name": "Deep Blue",
      "hex_code": "
          
          #003b76
       "
    },
    {
      "name": "Medium Blue",
      "hex_code": "
          
          #0051a8
       "
    },
    {
      "name": "Light Blue",
      "hex_code": "
          
          #0073e6
       "
    }
  ]
}

This stepped palette transitions smoothly from a very dark blue to a lighter blue, providing a gradient effect that can be used for various design purposes.

Would you like to explore how to implement this palette in a specific context or any other details?