Based on your query for a typographic poster with a 3-color palette, where the background consists of 2 colors (one for water and another for migrate), I’ve created the following color palette:

json
{
  "palette_name": "Water and Migrate",
  "colors": [
    {
      "name": "Ocean Blue",
      "hex_code": "
          
          #0077B3
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #00A3E0
       "
    },
    {
      "name": "Migration Green",
      "hex_code": "
          
          #5CBA47
       "
    }
  ]
}

Palette Description:

• Ocean Blue: A deep and calming blue that represents water, perfect for creating a soothing background.
• Sky Blue: A lighter shade of blue that adds brightness and represents the sky, providing a fresh and airy feel.
• Migration Green: A vibrant green that symbolizes growth and movement, ideal for typographic elements that convey the theme of migration.

Would you like to explore more color options or need any specific typography suggestions for your poster?