Examine source code of Walking Bridge . Sunset

{
  "name": "Walking Bridge . Sunset",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "SunsetBridge.jpg"
    },
    "colors": {
      "frame": "rgba(47, 35, 109, 1)",
      "tab_background_text": "rgba(255, 201, 221, 1)",
      "toolbar": "rgba(255, 255, 255, 0.15)",
      "bookmark_text": "rgba(223, 212, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(255, 250, 219, 1)"
    }
  }
}