Based on your request for a color palette for Google Sheets with a navy blue header, here is a suggested color palette:

json
{
  "palette_name": "Navy Blue Header Palette",
  "colors": [
    {
      "name": "Navy Blue",
      "hex_code": "
          
          #001F3F
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #87CEEB
       "
    },
    {
      "name": "Light Gray",
      "hex_code": "
          
          #D3D3D3
       "
    },
    {
      "name": "Coral",
      "hex_code": "
          
          #FF7F50
       "
    },
    {
      "name": "White",
      "hex_code": "
          
          #FFFFFF
       "
    }
  ]
}

Palette Description:

This palette features a strong navy blue for the header, complemented by a light sky blue for background sections, soft light gray for text or secondary elements, a warm coral for highlighting, and a classic white for clarity and contrast. This combination is designed to create a professional and visually appealing layout in Google Sheets.

Would you like to customize any colors or add more elements to this palette?