Here’s a color palette based on your provided colors and context of being elegant and pastel:

json
{
  "palette_name": "Elegant Pastel Serenity",
  "colors": [
    {
      "name": "Soft Aqua",
      "hex_code": "
          
          #90F0F0
       "
    },
    {
      "name": "Muted Teal",
      "hex_code": "
          
          #309090
       "
    },
    {
      "name": "Gentle Cyan",
      "hex_code": "
          
          #60C0C0
       "
    }
  ]
}

This palette features soft and calming shades of aqua and teal that evoke a sense of elegance and tranquility, perfect for a pastel aesthetic with plenty of white space.

Would you like to explore more colors or have a specific application in mind for this palette?