Examine source code of Magic is Green

{
  "theme": {
    "images": {
      "theme_frame": "kgreenH.jpg"
    },
    "colors": {
      "frame": "#00421e",
      "tab_background_text": "#66ffb8"
    }
  },
  "version": "2.0",
  "name": "Magic is Green",
  "manifest_version": 2,
  "description": "Rick dark green design featuring a pentagram starscape and lucky sigils."
}