Here’s a color palette designed to be color-blind friendly for green-yellow blindness, including 6 colors and 2 greyscale options (excluding black and white).

json
{
  "palette_name": "Color Blind Friendly Theme",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #00A3E0
       "
    },
    {
      "name": "Orange",
      "hex_code": "
          
          #F78E1E
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #005A8D
       "
    },
    {
      "name": "Violet",
      "hex_code": "
          
          #A45EBE
       "
    },
    {
      "name": "Light Green",
      "hex_code": "
          
          #D3E4C1
       "
    },
    {
      "name": "Brick Red",
      "hex_code": "
          
          #C0392B
       "
    },
    {
      "name": "Warm Grey",
      "hex_code": "
          
          #A89F91
       "
    },
    {
      "name": "Cool Grey",
      "hex_code": "
          
          #B7B09C
       "
    }
  ]
}

This palette incorporates distinct colors that are accessible for individuals with green-yellow color blindness, while also providing two shades of grey for versatility in your Excel theme.

Would you like any additional colors or adjustments to this palette?