Here is a color palette suitable for an Excel spreadsheet, featuring 7-8 colors that can help differentiate data effectively while maintaining a professional look.

json
{
  "palette_name": "Excel Data Visualization",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #87CEEB
                        "
    },
    {
      "name": "Light Coral",
      "hex_code": "
                            
                            #F08080
                        "
    },
    {
      "name": "Lime Green",
      "hex_code": "
                            
                            #32CD32
                        "
    },
    {
      "name": "Gold",
      "hex_code": "
                            
                            #FFD700
                        "
    },
    {
      "name": "Slate Gray",
      "hex_code": "
                            
                            #708090
                        "
    },
    {
      "name": "Tomato",
      "hex_code": "
                            
                            #FF6347
                        "
    },
    {
      "name": "Medium Orchid",
      "hex_code": "
                            
                            #BA55D3
                        "
    },
    {
      "name": "Wheat",
      "hex_code": "
                            
                            #F5DEB3
                        "
    }
  ]
}

This palette includes a mix of bright and muted colors that are visually appealing and can help to categorize and highlight information in your spreadsheet.

Would you like to see examples of how to apply these colors in your Excel spreadsheet, or do you have any other specific requirements?