Here is an expanded 16-color pastel palette for your garden party theme:

json
{
  "palette_name": "Extended Pastel Garden Party",
  "colors": [
    {
      "name": "Pastel Rose Pink",
      "hex_code": "
          
          #FFABAB
       "
    },
    {
      "name": "Pastel Green",
      "hex_code": "
          
          #B2E1B2
       "
    },
    {
      "name": "Pastel Yellow",
      "hex_code": "
          
          #FFF5BA
       "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
          
          #AEEEEE
       "
    },
    {
      "name": "Pastel Lavender",
      "hex_code": "
          
          #E6C9E6
       "
    },
    {
      "name": "Pastel Peach",
      "hex_code": "
          
          #FFD1BA
       "
    },
    {
      "name": "Pastel Mint",
      "hex_code": "
          
          #B2E3D8
       "
    },
    {
      "name": "Pastel Lilac",
      "hex_code": "
          
          #D6C4E7
       "
    },
    {
      "name": "Pastel Coral",
      "hex_code": "
          
          #FFB2B2
       "
    },
    {
      "name": "Pastel Lemon",
      "hex_code": "
          
          #FFF7A6
       "
    },
    {
      "name": "Pastel Aqua",
      "hex_code": "
          
          #B2E1E8
       "
    },
    {
      "name": "Pastel Periwinkle",
      "hex_code": "
          
          #C1C6E7
       "
    },
    {
      "name": "Pastel Buttercup",
      "hex_code": "
          
          #FFF2A6
       "
    },
    {
      "name": "Pastel Sage",
      "hex_code": "
          
          #B7D6B7
       "
    },
    {
      "name": "Pastel Orchid",
      "hex_code": "
          
          #E7B2E1
       "
    },
    {
      "name": "Pastel Cream",
      "hex_code": "
          
          #FFF8E1
       "
    }
  ]
}

This extended palette offers a variety of soft pastel colors that enhance the cheerful and inviting atmosphere of a garden party, providing plenty of options for decorations or designs.

Would you like to modify any specific colors or explore other themes?