Here’s a soft and muted vibrant rainbow color palette consisting of 18 distinct colors:

json
{
  "palette_name": "Soft Muted Rainbow",
  "colors": [
    {
      "name": "Soft Red",
      "hex_code": "
          
          #F28D8D
       "
    },
    {
      "name": "Light Coral",
      "hex_code": "
          
          #F2A3A3
       "
    },
    {
      "name": "Peach",
      "hex_code": "
          
          #F2BFA2
       "
    },
    {
      "name": "Soft Orange",
      "hex_code": "
          
          #F2CBA0
       "
    },
    {
      "name": "Light Apricot",
      "hex_code": "
          
          #F2D5A0
       "
    },
    {
      "name": "Soft Yellow",
      "hex_code": "
          
          #F2E0A0
       "
    },
    {
      "name": "Light Lemon",
      "hex_code": "
          
          #E1F2A0
       "
    },
    {
      "name": "Soft Green",
      "hex_code": "
          
          #A0E2A0
       "
    },
    {
      "name": "Mint Green",
      "hex_code": "
          
          #A0F2D4
       "
    },
    {
      "name": "Soft Cyan",
      "hex_code": "
          
          #A0E2E2
       "
    },
    {
      "name": "Light Sky Blue",
      "hex_code": "
          
          #A0CBE2
       "
    },
    {
      "name": "Soft Blue",
      "hex_code": "
          
          #A0A6E2
       "
    },
    {
      "name": "Light Periwinkle",
      "hex_code": "
          
          #A0A0E2
       "
    },
    {
      "name": "Soft Lavender",
      "hex_code": "
          
          #D1A0E2
       "
    },
    {
      "name": "Light Lilac",
      "hex_code": "
          
          #E2A0D1
       "
    },
    {
      "name": "Soft Pink",
      "hex_code": "
          
          #E2A0B1
       "
    },
    {
      "name": "Light Rose",
      "hex_code": "
          
          #E2A0A0
       "
    },
    {
      "name": "Soft Magenta",
      "hex_code": "
          
          #E2A0E2
       "
    },
    {
      "name": "Light Fuchsia",
      "hex_code": "
          
          #E2A0C8
       "
    }
  ]
}

This palette features soft and muted tones of vibrant colors that are distinct and can be easily differentiated from afar.

Is there anything specific you would like to know or do with this palette?