Here is a completely new color palette featuring 1 gray, 3 colors with 3 shades each (one dark, one medium, and one very light), along with one accent color:

json
{
  "palette_name": "Balanced Shades with Accent",
  "colors": [
    {
      "name": "Cool Gray",
      "hex_code": "
          
          #AFAFAF
       "
    },
    {
      "name": "Deep Forest Green",
      "hex_code": "
          
          #3B6A3A
       "
    },
    {
      "name": "Medium Forest Green",
      "hex_code": "
          
          #5C9A5C
       "
    },
    {
      "name": "Light Forest Green",
      "hex_code": "
          
          #A8D8A8
       "
    },
    {
      "name": "Deep Ocean Blue",
      "hex_code": "
          
          #004B87
       "
    },
    {
      "name": "Medium Ocean Blue",
      "hex_code": "
          
          #0076A8
       "
    },
    {
      "name": "Light Ocean Blue",
      "hex_code": "
          
          #A8D9E9
       "
    },
    {
      "name": "Deep Rose",
      "hex_code": "
          
          #B52D4C
       "
    },
    {
      "name": "Medium Rose",
      "hex_code": "
          
          #D05276
       "
    },
    {
      "name": "Light Rose",
      "hex_code": "
          
          #F2B2C6
       "
    },
    {
      "name": "Accent Gold",
      "hex_code": "
          
          #C9A35D
       "
    }
  ]
}

This palette, “Balanced Shades with Accent,” features a cool gray, complemented by three colors (forest green, ocean blue, and rose) each with three shades, allowing for depth and variety. The accent gold adds a touch of warmth and can be used to highlight key data points or elements in your design.

Would you like any specific advice on how to implement this palette in your Excel chart or any other project?