Here is a revised color palette that incorporates maroon along with variations of red, while maintaining the original colors you liked:

json
{
  "palette_name": "Crimson Forest",
  "colors": [
    {
      "name": "Forest Green",
      "hex_code": "
                            
                            #228B22
                        "
    },
    {
      "name": "Cream",
      "hex_code": "
                            
                            #FFFDD0
                        "
    },
    {
      "name": "Metallic Gold",
      "hex_code": "
                            
                            #D4AF37
                        "
    },
    {
      "name": "Deep Black",
      "hex_code": "
                            
                            #000000
                        "
    },
    {
      "name": "Maroon",
      "hex_code": "
                            
                            #800000
                        "
    },
    {
      "name": "Cherry Red",
      "hex_code": "
                            
                            #FF3D3D
                        "
    }
  ]
}

This palette, “Crimson Forest,” features the luxurious combination of forest green, cream, and gold, enhanced by the depth of deep black and the richness of maroon, alongside a vibrant cherry red for a striking contrast.

Would you like to see any more variations or specific combinations?