Here is a color palette consisting of 16 colors suitable for use in Excel graphs, represented in RGB format.

json
{
  "palette_name": "Excel Graph Colors",
  "colors": [
    {
      "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": "Orange",
      "hex_code": "
          
          #FFA500
       "
    },
    {
      "name": "Purple",
      "hex_code": "
          
          #800080
       "
    },
    {
      "name": "Lime",
      "hex_code": "
          
          #00FF00
       "
    },
    {
      "name": "Pink",
      "hex_code": "
          
          #FFC0CB
       "
    },
    {
      "name": "Brown",
      "hex_code": "
          
          #A52A2A
       "
    },
    {
      "name": "Gray",
      "hex_code": "
          
          #808080
       "
    },
    {
      "name": "Olive",
      "hex_code": "
          
          #808000
       "
    },
    {
      "name": "Navy",
      "hex_code": "
          
          #000080
       "
    },
    {
      "name": "Teal",
      "hex_code": "
          
          #008080
       "
    },
    {
      "name": "Coral",
      "hex_code": "
          
          #FF7F50
       "
    }
  ]
}

This palette provides a diverse range of colors that can effectively differentiate data points in your Excel graphs. Would you like any additional information or another color palette?