Here is a color palette designed for graph series on a dark background, incorporating your specified colors #dc4c76 and #efbd5d , along with complementary colors that will stand out well.

json
{
  "palette_name": "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
                        "
    }
  ]
}

This palette combines vibrant and contrasting colors that will be visually appealing against a dark background, making it suitable for graph series.

Would you like any additional colors or specific adjustments to this palette?