Here is a 1970s-inspired rainbow color palette with 8 colors sorted by hue that would stand out beautifully against a black background:

json
{
  "palette_name": "1970s Rainbow Retro",
  "colors": [
    {
      "name": "Red",
      "hex_code": "
          
          #FF3D00
       "
    },
    {
      "name": "Orange",
      "hex_code": "
          
          #FF6F00
       "
    },
    {
      "name": "Yellow",
      "hex_code": "
          
          #FFEA00
       "
    },
    {
      "name": "Green",
      "hex_code": "
          
          #76FF03
       "
    },
    {
      "name": "Turquoise",
      "hex_code": "
          
          #00B8D4
       "
    },
    {
      "name": "Blue",
      "hex_code": "
          
          #2962FF
       "
    },
    {
      "name": "Indigo",
      "hex_code": "
          
          #4B0082
       "
    },
    {
      "name": "Violet",
      "hex_code": "
          
          #AA00FF
       "
    }
  ]
}

This palette captures the vibrant essence of the 1970s rainbow aesthetic and works well against a black background.

Would you like any additional information or suggestions on how to use this palette?