Here is a pastel rainbow color palette consisting of 15 colors:

json
{
  "palette_name": "Pastel Rainbow",
  "colors": [
    {
      "name": "Pastel Pink",
      "hex_code": "
          
          #FFB3BA
       "
    },
    {
      "name": "Pastel Orange",
      "hex_code": "
          
          #FFDFBA
       "
    },
    {
      "name": "Pastel Yellow",
      "hex_code": "
          
          #FFFFBA
       "
    },
    {
      "name": "Pastel Green",
      "hex_code": "
          
          #BAFFC9
       "
    },
    {
      "name": "Pastel Teal",
      "hex_code": "
          
          #BAE1FF
       "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
          
          #A0C4FF
       "
    },
    {
      "name": "Pastel Lavender",
      "hex_code": "
          
          #CBAACB
       "
    },
    {
      "name": "Pastel Purple",
      "hex_code": "
          
          #D6C6E8
       "
    },
    {
      "name": "Pastel Mint",
      "hex_code": "
          
          #B4F8C8
       "
    },
    {
      "name": "Pastel Coral",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Pastel Peach",
      "hex_code": "
          
          #FFD2A6
       "
    },
    {
      "name": "Pastel Lilac",
      "hex_code": "
          
          #EAB8E4
       "
    },
    {
      "name": "Pastel Cream",
      "hex_code": "
          
          #F6E0B5
       "
    },
    {
      "name": "Pastel Sky Blue",
      "hex_code": "
          
          #A8D8EA
       "
    },
    {
      "name": "Pastel Salmon",
      "hex_code": "
          
          #FF9AA2
       "
    }
  ]
}

This Pastel Rainbow palette features soft, gentle colors that evoke a sense of calm and joy, perfect for springtime themes, children’s designs, or any project that benefits from a light and cheerful aesthetic.

Would you like to know more about how to use this palette, or do you have any other color themes in mind?