Examine source code of Glow

{
  "name": "glowing",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "digital-digital-art-artwork-illustration-abstract-hd-wallpaper-preview.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(193, 0, 219, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(187, 0, 255, 1)"
    }
  }
}