Examine source code of Earthy Trees

{
  "name": "Country Side",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "3.png"
    },
    "colors": {
      "frame": "rgba(126, 109, 81, 0.51)",
      "tab_background_text": "rgba(147, 163, 130, 1)",
      "toolbar": "rgba(135, 138, 155, 1)",
      "bookmark_text": "rgba(187, 156, 59, 1)",
      "toolbar_field": "rgba(147, 163, 130, 1)",
      "toolbar_field_text": "rgba(61, 72, 58, 1)"
    }
  }
}