Here’s a pastel rainbow color palette for you:

json
{
  "palette_name": "Pastel Rainbow",
  "colors": [
    {
      "name": "Pastel Red",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Pastel Orange",
      "hex_code": "
          
          #FFB74D
       "
    },
    {
      "name": "Pastel Yellow",
      "hex_code": "
          
          #FFEB3B
       "
    },
    {
      "name": "Pastel Green",
      "hex_code": "
          
          #A5D6A7
       "
    },
    {
      "name": "Pastel Cyan",
      "hex_code": "
          
          #4FC3F7
       "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
          
          #64B5F6
       "
    },
    {
      "name": "Pastel Indigo",
      "hex_code": "
          
          #7986CB
       "
    },
    {
      "name": "Pastel Violet",
      "hex_code": "
          
          #BA68C8
       "
    },
    {
      "name": "Pastel Pink",
      "hex_code": "
          
          #F48FB1
       "
    },
    {
      "name": "Pastel Lavender",
      "hex_code": "
          
          #E1BEE7
       "
    },
    {
      "name": "Pastel Mint",
      "hex_code": "
          
          #B2EBF2
       "
    },
    {
      "name": "Pastel Peach",
      "hex_code": "
          
          #FFAB91
       "
    }
  ]
}

This palette features soft, pastel versions of classic rainbow colors, perfect for a light and cheerful aesthetic.

Do you have a specific project in mind for this palette, or would you like to see variations or additional colors?