Examine source code of yellowboy

{
  "theme": {
    "images": {
      "theme_frame": "yellowboy.jpg"
    },
    "colors": {
      "frame": "#47a9ff",
      "tab_background_text": "#ffc94a"
    }
  },
  "version": "2.0",
  "name": "yellowboy",
  "manifest_version": 2,
  "description": ":D"
}