Examine source code of Pixel Art City

{
  "name": "Pixel Art City",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Pixel_Art_City.png"
    },
    "colors": {
      "frame": "rgba(32, 18, 48, 1)",
      "tab_background_text": "rgba(248, 255, 212, 0.82)",
      "toolbar": "rgba(32, 18, 48, 0.15)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(32, 18, 48, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}