Here is a color palette based on your request for one eye-catching color of sadness and two muted, non-neutral colors.

json
{
  "palette_name": "Melancholic Harmony",
  "colors": [
    {
      "name": "Deep Blue",
      "hex_code": "
          
          #003366
       "
    },
    {
      "name": "Soft Lavender",
      "hex_code": "
          
          #E6E6FA
       "
    },
    {
      "name": "Muted Olive",
      "hex_code": "
          
          #3D9970
       "
    }
  ]
}

Palette Description: This palette features a deep blue to evoke feelings of sadness, paired with soft lavender and muted olive shades that bring a sense of calm and introspection without being neutral.

What do you think of this palette? Would you like to explore more colors or variations?