Examine source code of aspen leaves

{
  "name": "aspen leaves",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "fullsizeoutput_3e7.jpeg"
    },
    "colors": {
      "frame": "rgba(227, 228, 230, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(107, 107, 107, 0.45)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(240, 240, 240, 0.88)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(121, 137, 201, 1)"
    }
  }
}