Examine source code of Finally Tranquil

{
  "theme": {
    "images": {
      "theme_frame": "Tree.jpg"
    },
    "colors": {
      "frame": "#10128f",
      "tab_background_text": "#108587"
    }
  },
  "version": "2.0",
  "name": "Finally Tranquil",
  "manifest_version": 2,
  "description": "Peaceful, lone tree"
}