Thank you for your feedback. Let’s ensure that the colors are visually distinct while still maintaining the hue shifts. Here’s the updated palette with more contrasting colors:

json
{
  "palette_name": "Distinctly Shifted Mellow Tones",
  "colors": [
    {
      "name": "Dark Teal",
      "hex_code": "
                            
                            #005B5A
                        "
    },
    {
      "name": "Reddish Sienna",
      "hex_code": "
                            
                            #C75B3E
                        "
    },
    {
      "name": "Vibrant Aubergine",
      "hex_code": "
                            
                            #6F2C91
                        "
    },
    {
      "name": "Warm Olive",
      "hex_code": "
                            
                            #8A8D3C
                        "
    }
  ]
}

In this palette, I replaced Muted Plum with a more vibrant Aubergine to ensure better visual distinction between the colors.

Does this adjustment work better for you? Would you like any further changes?