Here is a pastel color palette suitable for a success background and border:

json
{
  "palette_name": "Pastel Success",
  "colors": [
    {
      "name": "Light Green",
      "hex_code": "
          
          #B2E0B2
       "
    },
    {
      "name": "Soft Yellow",
      "hex_code": "
          
          #F6E7A0
       "
    },
    {
      "name": "Pale Blue",
      "hex_code": "
          
          #A0C4E5
       "
    },
    {
      "name": "Lavender",
      "hex_code": "
          
          #E4C1E5
       "
    },
    {
      "name": "Peach",
      "hex_code": "
          
          #F2C2B2
       "
    }
  ]
}

This color palette features soft, pastel shades that convey a sense of calm and positivity, making it perfect for success-related themes.

Would you like more options or suggestions on how to use these colors effectively?