Sure! Here’s the updated complementary green palette with a darker olive shade replacing the mint green:

json
{
  "palette_name": "Complementary Greens - Darkened",
  "colors": [
    {
      "name": "Olive Green",
      "hex_code": "
                            
                            #737B5A
                        "
    },
    {
      "name": "Sage Green",
      "hex_code": "
                            
                            #A8BFA5
                        "
    },
    {
      "name": "Moss Green",
      "hex_code": "
                            
                            #4C5B4A
                        "
    },
    {
      "name": "Dark Olive Brown",
      "hex_code": "
                            
                            #4A3D2A
                        "
    }
  ]
}

In this updated palette, the Dark Olive Brown adds depth and a rich, earthy tone that complements the other greens beautifully, enhancing the vintage and tropical feel of the overall design.

How does this new combination look to you? Would you like to make any further changes or additions?