Here’s another color palette featuring darker, professional tones that can be used effectively in Excel:

json
{
  "palette_name": "Refined Contrast",
  "colors": [
    {
      "name": "Charcoal Black",
      "hex_code": "
          
          #333333
       "
    },
    {
      "name": "Teal",
      "hex_code": "
          
          #007B7F
       "
    },
    {
      "name": "Mulberry",
      "hex_code": "
          
          #7A2B57
       "
    },
    {
      "name": "Olive Green",
      "hex_code": "
          
          #4A5E2F
       "
    },
    {
      "name": "Copper",
      "hex_code": "
          
          #B76E3B
       "
    },
    {
      "name": "Dusty Blue",
      "hex_code": "
          
          #6C8EBF
       "
    },
    {
      "name": "Burgundy",
      "hex_code": "
          
          #8B1A35
       "
    },
    {
      "name": "Steel Gray",
      "hex_code": "
          
          #7B7B7B
       "
    }
  ]
}

This palette offers refined contrast with a mix of deep and muted colors, ideal for creating a professional but visually striking atmosphere in your Excel spreadsheets.

If you have any particular preferences for color combinations or a specific context in which you plan to use these colors, feel free to share!