Here is a vibrant 70s rainbow color palette featuring 8 colors that stand out well against a black background:

json
{
  "palette_name": "70s Rainbow",
  "colors": [
    {
      "name": "Red",
      "hex_code": "
          
          #FF3D00
       "
    },
    {
      "name": "Orange",
      "hex_code": "
          
          #FF8F00
       "
    },
    {
      "name": "Yellow",
      "hex_code": "
          
          #FFC400
       "
    },
    {
      "name": "Green",
      "hex_code": "
          
          #00E676
       "
    },
    {
      "name": "Cyan",
      "hex_code": "
          
          #00B0FF
       "
    },
    {
      "name": "Blue",
      "hex_code": "
          
          #2979FF
       "
    },
    {
      "name": "Indigo",
      "hex_code": "
          
          #6200EA
       "
    },
    {
      "name": "Violet",
      "hex_code": "
          
          #AA00FF
       "
    }
  ]
}

This palette captures the colorful essence of the 70s with bold hues that provide excellent contrast over a black background.

What do you think about this palette? Would you like to explore variations or additional palettes?