Here is a color palette featuring 15 different pastel colors suitable for Excel:

json
{
  "palette_name": "Pastel Rainbow",
  "colors": [
    {
      "name": "Pastel Pink",
      "hex_code": "
          
          #FFB3C1
       "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
          
          #A2C2E0
       "
    },
    {
      "name": "Pastel Green",
      "hex_code": "
          
          #B2E0B2
       "
    },
    {
      "name": "Pastel Yellow",
      "hex_code": "
          
          #FFF5A5
       "
    },
    {
      "name": "Pastel Purple",
      "hex_code": "
          
          #D6C3E0
       "
    },
    {
      "name": "Pastel Peach",
      "hex_code": "
          
          #FFE5B4
       "
    },
    {
      "name": "Pastel Lavender",
      "hex_code": "
          
          #E6D5E0
       "
    },
    {
      "name": "Pastel Mint",
      "hex_code": "
          
          #B3E5D8
       "
    },
    {
      "name": "Pastel Coral",
      "hex_code": "
          
          #FFB3AB
       "
    },
    {
      "name": "Pastel Turquoise",
      "hex_code": "
          
          #A4DBE8
       "
    },
    {
      "name": "Pastel Lilac",
      "hex_code": "
          
          #E4D0E6
       "
    },
    {
      "name": "Pastel Lemon",
      "hex_code": "
          
          #F8E5B4
       "
    },
    {
      "name": "Pastel Seafoam",
      "hex_code": "
          
          #A8E0D5
       "
    },
    {
      "name": "Pastel Salmon",
      "hex_code": "
          
          #FFB7A1
       "
    },
    {
      "name": "Pastel Apricot",
      "hex_code": "
          
          #FFDAB3
       "
    }
  ]
}

This palette includes a variety of soft and soothing hues, perfect for creating a gentle and inviting visual experience in Excel. Would you like to know more about how to use these colors in your projects?