Here’s a color palette featuring darker shades that complement the previously provided washed-out pastels. These deeper colors will provide contrast and depth while still aligning with the overall theme.

json
{
  "palette_name": "Complementary Dark Shades",
  "colors": [
    {
      "name": "Deep Teal",
      "hex_code": "
                            
                            #007A7C
                        "
    },
    {
      "name": "Rich Coral",
      "hex_code": "
                            
                            #B03A2E
                        "
    },
    {
      "name": "Burnt Orange",
      "hex_code": "
                            
                            #D75B1C
                        "
    },
    {
      "name": "Goldenrod",
      "hex_code": "
                            
                            #C6A600
                        "
    },
    {
      "name": "Dark Sky Blue",
      "hex_code": "
                            
                            #005B73
                        "
    },
    {
      "name": "Midnight Lavender",
      "hex_code": "
                            
                            #3E2A91
                        "
    },
    {
      "name": "Forest Green",
      "hex_code": "
                            
                            #2C6B5D
                        "
    },
    {
      "name": "Terracotta",
      "hex_code": "
                            
                            #D0522C
                        "
    },
    {
      "name": "Teal Blue",
      "hex_code": "
                            
                            #005A74
                        "
    },
    {
      "name": "Sandy Brown",
      "hex_code": "
                            
                            #C49A6A
                        "
    }
  ]
}

These darker colors can be used as accents or backgrounds to provide contrast against the lighter pastel colors, enhancing the overall visual appeal of your promotional materials. Would you like any more assistance or additional palettes?