Examine source code of Colour Rounds

{
  "theme": {
    "images": {
      "theme_frame": "rounds_.png"
    },
    "colors": {
      "frame": "#ff1983",
      "tab_background_text": "#ff1983"
    }
  },
  "version": "2.0",
  "name": "Colour Rounds",
  "manifest_version": 2,
  "description": "colour rounds"
}