Examine source code of Neon Cityscape

{
  "name": "Neon Cityscape",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "tumblr_osq7x1fnSK1tk8zawo1_1280.jpg"
    },
    "colors": {
      "frame": "rgba(0, 15, 97, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(44, 38, 171, 0.73)",
      "bookmark_text": "rgba(194, 173, 255, 1)",
      "toolbar_field": "rgba(224, 212, 255, 1)",
      "toolbar_field_text": "rgba(17, 4, 51, 1)"
    }
  }
}