Here is a color palette that focuses on darker hues, complementing the original muted colors #A7B18E and #CFC1DF :

json
{
  "palette_name": "Muted Dark Hues",
  "colors": [
    {
      "name": "Deep Olive Green",
      "hex_code": "
                            
                            #5B6B4E
                        "
    },
    {
      "name": "Charcoal Lavender",
      "hex_code": "
                            
                            #4B3C5A
                        "
    },
    {
      "name": "Rustic Maroon",
      "hex_code": "
                            
                            #7D4D4D
                        "
    },
    {
      "name": "Stormy Teal",
      "hex_code": "
                            
                            #4A757B
                        "
    },
    {
      "name": "Muted Mustard Brown",
      "hex_code": "
                            
                            #7A6A3A
                        "
    },
    {
      "name": "Soft Plum",
      "hex_code": "
                            
                            #5C4A66
                        "
    },
    {
      "name": "Slate Gray",
      "hex_code": "
                            
                            #4B5453
                        "
    },
    {
      "name": "Dusky Blue",
      "hex_code": "
                            
                            #4E5D71
                        "
    }
  ]
}

This palette incorporates darker, muted shades that provide depth and contrast while staying true to a subdued aesthetic. Would you like ideas on how to combine these colors in a specific project or context?