Here is a color palette that consists of 16 colors suitable for Excel:

json
{
  "palette_name": "Excel Colors",
  "colors": [
    {
      "name": "Black",
      "hex_code": "
          
          #000000
       "
    },
    {
      "name": "White",
      "hex_code": "
          
          #FFFFFF
       "
    },
    {
      "name": "Red",
      "hex_code": "
          
          #FF0000
       "
    },
    {
      "name": "Green",
      "hex_code": "
          
          #00FF00
       "
    },
    {
      "name": "Blue",
      "hex_code": "
          
          #0000FF
       "
    },
    {
      "name": "Yellow",
      "hex_code": "
          
          #FFFF00
       "
    },
    {
      "name": "Cyan",
      "hex_code": "
          
          #00FFFF
       "
    },
    {
      "name": "Magenta",
      "hex_code": "
          
          #FF00FF
       "
    },
    {
      "name": "Gray",
      "hex_code": "
          
          #808080
       "
    },
    {
      "name": "Light Gray",
      "hex_code": "
          
          #D3D3D3
       "
    },
    {
      "name": "Dark Red",
      "hex_code": "
          
          #800000
       "
    },
    {
      "name": "Dark Green",
      "hex_code": "
          
          #008000
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #000080
       "
    },
    {
      "name": "Olive",
      "hex_code": "
          
          #808000
       "
    },
    {
      "name": "Navy",
      "hex_code": "
          
          #0000A0
       "
    },
    {
      "name": "Purple",
      "hex_code": "
          
          #800080
       "
    }
  ]
}

This palette includes a range of basic and vibrant colors that can be used for various purposes in Excel, from charts to cell formatting.

Do you need any specific colors or shades added to this palette? Or would you like suggestions on how to use these colors in your Excel projects?