Examine source code of GreenlandTheme

{
  "name": "GreenlandTheme",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "1x1-clear.gif"
    },
    "colors": {
      "frame": "rgba(74, 167, 44, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(245, 196, 196, 1)",
      "bookmark_text": "rgba(128, 72, 72, 1)"
    }
  }
}