Here’s an expanded color palette for graph series on a dark background, adding more colors while maintaining the vibrant and contrasting theme.

json
{
  "palette_name": "Expanded Dark Background Graph Series",
  "colors": [
    {
      "name": "Vivid Pink",
      "hex_code": "
          
          #dc4c76
       "
    },
    {
      "name": "Golden Yellow",
      "hex_code": "
          
          #efbd5d
       "
    },
    {
      "name": "Teal Blue",
      "hex_code": "
          
          #008080
       "
    },
    {
      "name": "Bright Cyan",
      "hex_code": "
          
          #00bcd4
       "
    },
    {
      "name": "Soft Lavender",
      "hex_code": "
          
          #e1bee7
       "
    },
    {
      "name": "Electric Lime",
      "hex_code": "
          
          #aeea00
       "
    },
    {
      "name": "Coral Red",
      "hex_code": "
          
          #ff5722
       "
    },
    {
      "name": "Royal Purple",
      "hex_code": "
          
          #673ab7
       "
    },
    {
      "name": "Charcoal Gray",
      "hex_code": "
          
          #424242
       "
    },
    {
      "name": "Bright Orange",
      "hex_code": "
          
          #ff9800
       "
    }
  ]
}

This updated palette now includes additional vibrant colors like Coral Red, Royal Purple, and Bright Orange, which will provide even more options for your graph series on a dark background.

Would you like any specific adjustments or further additions?