[Green]a part in green [white] white [gREen]green, [white]white, [GREEN]last green
[RED]a part in red

§aa part in green §f white §agreen, §fwhite, §alast green§ca part in red

[
  {
    "text": "",
    "extra": [
      {
        "text": "",
        "extra": [
          {
            "text": "a part in green ",
            "color": "green"
          },
          " white ",
          {
            "text": "green, ",
            "color": "green"
          },
          "white, ",
          {
            "text": "last green",
            "color": "green"
          }
        ]
      },
      {
        "text": "a part in red",
        "color": "red"
      }
    ]
  }
]