Examine source code of twinkle

{
  "theme": {
    "images": {
      "theme_frame": "twinkletop.jpg"
    },
    "colors": {
      "frame": "#4911f2",
      "tab_background_text": "#bda1bc"
    }
  },
  "version": "2.0",
  "name": "twinkle",
  "manifest_version": 2,
  "description": "sparkling stars"
}