Here’s a color palette inspired by the vibrant and retro feel of the 1950s rainbow gradient, designed to stand out against a black background:

json
{
  "palette_name": "1950s Rainbow Gradient",
  "colors": [
    {
      "name": "Bright Pink",
      "hex_code": "
          
          #FF6F91
       "
    },
    {
      "name": "Coral",
      "hex_code": "
          
          #FF9A8B
       "
    },
    {
      "name": "Sunshine Yellow",
      "hex_code": "
          
          #F8D3A0
       "
    },
    {
      "name": "Mint Green",
      "hex_code": "
          
          #A6E1D6
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #A0D7E6
       "
    },
    {
      "name": "Lavender",
      "hex_code": "
          
          #C8A2E0
       "
    },
    {
      "name": "Periwinkle",
      "hex_code": "
          
          #9AABEA
       "
    },
    {
      "name": "Peach",
      "hex_code": "
          
          #FFB88C
       "
    }
  ]
}

This palette captures the playful and colorful essence of the 1950s, making it perfect for a logo that pops against a black background.

Would you like any specific adjustments or additional colors?