Examine source code of legular

{
  "theme": {
    "images": {
      "theme_frame": "legular.jpg"
    },
    "colors": {
      "frame": "#1535d4",
      "tab_background_text": "#fcf7f7"
    }
  },
  "version": "2.0",
  "name": "legular",
  "manifest_version": 2,
  "description": "lego blocks"
}