Here is a revised color palette with more muted colors, making it easier on the eyes while still allowing for differentiation between the years in Excel.

json
{
  "palette_name": "Muted Years in Excel",
  "colors": [
    {
      "name": "Year 1",
      "hex_code": "
          
          #D5B5A0
       "
    },
    {
      "name": "Year 2",
      "hex_code": "
          
          #A8D5BA
       "
    },
    {
      "name": "Year 3",
      "hex_code": "
          
          #A0C4E1
       "
    },
    {
      "name": "Year 4",
      "hex_code": "
          
          #E0C68B
       "
    },
    {
      "name": "Year 5",
      "hex_code": "
          
          #C39BD3
       "
    },
    {
      "name": "Year 6",
      "hex_code": "
          
          #EAB8A1
       "
    },
    {
      "name": "Year 7",
      "hex_code": "
          
          #A8E6CF
       "
    },
    {
      "name": "Year 8",
      "hex_code": "
          
          #B2C2E8
       "
    },
    {
      "name": "Year 9",
      "hex_code": "
          
          #D5B5D3
       "
    },
    {
      "name": "Year 10",
      "hex_code": "
          
          #A1D3D1
       "
    }
  ]
}

This muted palette should be easier to work with while still providing a clear distinction between each year. Would you like to make any further adjustments or do you have any specific colors in mind?