Here is a soft vibrant rainbow color palette with 18 distinct colors:

json
{
  "palette_name": "Soft Vibrant Rainbow",
  "colors": [
    {
      "name": "Soft Red",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Soft Orange",
      "hex_code": "
          
          #FF8F3D
       "
    },
    {
      "name": "Soft Yellow",
      "hex_code": "
          
          #FFD54F
       "
    },
    {
      "name": "Soft Lime",
      "hex_code": "
          
          #B2D85B
       "
    },
    {
      "name": "Soft Green",
      "hex_code": "
          
          #4CAF50
       "
    },
    {
      "name": "Soft Teal",
      "hex_code": "
          
          #009688
       "
    },
    {
      "name": "Soft Cyan",
      "hex_code": "
          
          #00BCD4
       "
    },
    {
      "name": "Soft Sky Blue",
      "hex_code": "
          
          #81D4FA
       "
    },
    {
      "name": "Soft Blue",
      "hex_code": "
          
          #2196F3
       "
    },
    {
      "name": "Soft Indigo",
      "hex_code": "
          
          #3F51B5
       "
    },
    {
      "name": "Soft Violet",
      "hex_code": "
          
          #673AB7
       "
    },
    {
      "name": "Soft Lavender",
      "hex_code": "
          
          #E1BEE7
       "
    },
    {
      "name": "Soft Pink",
      "hex_code": "
          
          #F48FB1
       "
    },
    {
      "name": "Soft Peach",
      "hex_code": "
          
          #FFABAB
       "
    },
    {
      "name": "Soft Coral",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Soft Mint",
      "hex_code": "
          
          #B2E0D3
       "
    },
    {
      "name": "Soft Magenta",
      "hex_code": "
          
          #D81B60
       "
    },
    {
      "name": "Soft Lemon",
      "hex_code": "
          
          #FFF176
       "
    },
    {
      "name": "Soft Periwinkle",
      "hex_code": "
          
          #A7C6ED
       "
    }
  ]
}

This palette features a range of soft yet vibrant colors, ensuring that each hue is distinct and easily recognizable from afar.

Would you like to use this palette for a specific project, or do you need any additional colors or adjustments?