Here is an alternative color palette for data visualization with new colors replacing Navy, Cyan, and Steel Blue, while keeping your specified colors ( #00205B and #00B2E3 ):

json
{
  "palette_name": "Alternative Cool Blues Palette",
  "colors": [
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #00205B
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #00B2E3
       "
    },
    {
      "name": "Light Blue",
      "hex_code": "
          
          #ADD8E6
       "
    },
    {
      "name": "Royal Blue",
      "hex_code": "
          
          #4169E1
       "
    },
    {
      "name": "Electric Blue",
      "hex_code": "
          
          #7DF9FF
       "
    },
    {
      "name": "Powder Blue",
      "hex_code": "
          
          #B0E0E6
       "
    },
    {
      "name": "Dark Turquoise",
      "hex_code": "
          
          #00CED1
       "
    }
  ]
}

This updated palette provides a fresh selection of colors while maintaining a cool color theme suitable for data visualization.

Would you like to make any further changes or explore other options?