Here is a color palette with six visually distinct dark colors that achieve a good contrast with the color #FEFEFE (white).

json
{
  "palette_name": "Dark Contrast Palette",
  "colors": [
    {
      "name": "Charcoal",
      "hex_code": "
          
          #333333
       "
    },
    {
      "name": "Midnight Blue",
      "hex_code": "
          
          #1A1A4B
       "
    },
    {
      "name": "Dark Olive Green",
      "hex_code": "
          
          #3A3D24
       "
    },
    {
      "name": "Maroon",
      "hex_code": "
          
          #4B2C2C
       "
    },
    {
      "name": "Dark Slate Gray",
      "hex_code": "
          
          #2F4F4F
       "
    },
    {
      "name": "Deep Purple",
      "hex_code": "
          
          #4B0082
       "
    }
  ]
}

This palette provides a range of dark colors that should meet accessibility standards for text contrast against a light background. Would you like to see more color options or perhaps a different color theme?