Examine source code of Snow Falling

{
  "name": "Snow Falling",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "SnowFall.jpg"
    },
    "colors": {
      "frame": "rgba(239, 244, 247, 1)",
      "tab_background_text": "rgba(0, 79, 125, 1)",
      "toolbar": "rgba(144, 200, 240, 0.17)",
      "bookmark_text": "rgba(0, 97, 158, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}