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

json
{
  "palette_name": "Muted Vibrant Rainbow",
  "colors": [
    {
      "name": "Muted Red",
      "hex_code": "
          
          #C76A6A
       "
    },
    {
      "name": "Muted Orange",
      "hex_code": "
          
          #DFAF8D
       "
    },
    {
      "name": "Muted Yellow",
      "hex_code": "
          
          #E8D09E
       "
    },
    {
      "name": "Muted Yellow-Green",
      "hex_code": "
          
          #C6D8A7
       "
    },
    {
      "name": "Muted Green",
      "hex_code": "
          
          #A8C5A2
       "
    },
    {
      "name": "Muted Cyan",
      "hex_code": "
          
          #A1D6D5
       "
    },
    {
      "name": "Muted Blue",
      "hex_code": "
          
          #85B3D1
       "
    },
    {
      "name": "Muted Blue-Violet",
      "hex_code": "
          
          #A4A6D5
       "
    },
    {
      "name": "Muted Violet",
      "hex_code": "
          
          #B29CCB
       "
    },
    {
      "name": "Muted Lavender",
      "hex_code": "
          
          #D3B7D2
       "
    },
    {
      "name": "Muted Pink",
      "hex_code": "
          
          #D49BAA
       "
    },
    {
      "name": "Muted Coral",
      "hex_code": "
          
          #D78C7A
       "
    },
    {
      "name": "Muted Peach",
      "hex_code": "
          
          #F4D1B0
       "
    },
    {
      "name": "Muted Mint",
      "hex_code": "
          
          #A3E3E0
       "
    },
    {
      "name": "Muted Teal",
      "hex_code": "
          
          #7FB2A8
       "
    },
    {
      "name": "Muted Turquoise",
      "hex_code": "
          
          #6BDBDB
       "
    },
    {
      "name": "Muted Periwinkle",
      "hex_code": "
          
          #A2B6E0
       "
    },
    {
      "name": "Muted Plum",
      "hex_code": "
          
          #A77B9D
       "
    },
    {
      "name": "Muted Raspberry",
      "hex_code": "
          
          #D67D91
       "
    }
  ]
}

This palette provides a range of muted yet vibrant colors across the spectrum, ensuring they remain distinct from one another.

Would you like to explore specific applications for this palette, such as design projects or artwork?