Here’s an updated 12-color version of your “Updated Pastel Light Colors for Excel” palette while maintaining the overall soft and pastel theme:

json
{
  "palette_name": "Extended Pastel Light Colors for Excel",
  "colors": [
    {
      "name": "Soft Blue",
      "hex_code": "
          
          #A4C8E1
       "
    },
    {
      "name": "Mint Green",
      "hex_code": "
          
          #B2E4D7
       "
    },
    {
      "name": "Light Yellow",
      "hex_code": "
          
          #F4E68A
       "
    },
    {
      "name": "Peach",
      "hex_code": "
          
          #F5CBA0
       "
    },
    {
      "name": "Light Lavender",
      "hex_code": "
          
          #E2C9E6
       "
    },
    {
      "name": "Light Apricot",
      "hex_code": "
          
          #F5E8A8
       "
    },
    {
      "name": "Pale Pink",
      "hex_code": "
          
          #F2B2C6
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #A7D3E0
       "
    },
    {
      "name": "Soft Lilac",
      "hex_code": "
          
          #E3D1E5
       "
    },
    {
      "name": "Light Coral",
      "hex_code": "
          
          #F7B2A2
       "
    },
    {
      "name": "Buttercream",
      "hex_code": "
          
          #F8E1A1
       "
    },
    {
      "name": "Mint Cream",
      "hex_code": "
          
          #D8F7E7
       "
    },
    {
      "name": "Pale Peach",
      "hex_code": "
          
          #F9D9B7
       "
    }
  ]
}

The updated palette maintains the soft and elegant feel of your original set while introducing a variety of additional pastel shades for more visual interest.

Would you like to make any additional changes or have any specific colors in mind that you would like to see included?