Examine source code of transparent_magic

{
  "theme": {
    "images": {
      "theme_frame": "transparent.png"
    },
    "colors": {
      "frame": "#9c0c0c",
      "tab_background_text": "#2aa165"
    }
  },
  "version": "2.0",
  "name": "transparent_magic",
  "manifest_version": 2,
  "description": "transparent"
}