Here is an updated color palette for data visualization, excluding greys, greens, reds, and oranges while retaining your specified colors ( #00205B and #00B2E3 ):

json
{
  "palette_name": "Cool Blues Palette",
  "colors": [
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #00205B
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #00B2E3
       "
    },
    {
      "name": "Light Blue",
      "hex_code": "
          
          #ADD8E6
       "
    },
    {
      "name": "Navy",
      "hex_code": "
          
          #001F3F
       "
    },
    {
      "name": "Teal",
      "hex_code": "
          
          #008080
       "
    }
  ]
}

This palette focuses on various shades of blue, providing a cohesive and visually appealing scheme for your data visualization needs.

Would you like any more adjustments, or do you have further requirements?