Examine source code of Dark Greyish - Pattern

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Greyish Green Pattern",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(131, 151, 145, 0.17)",
      "toolbar_text": "rgba(255, 255, 255, 0.95)",
      "frame": "rgb(3, 3, 3)",
      "tab_background_text": "rgb(154, 154, 154)",
      "toolbar_field": "rgba(28, 28, 28, 0.93)",
      "toolbar_field_text": "rgb(206, 76, 76)",
      "tab_line": "rgba(214, 214, 214, 0.27)",
      "popup": "rgba(52, 52, 52, 0.8)",
      "popup_text": "rgb(234, 234, 234)",
      "button_background_active": "rgba(89, 116, 84, 0.6)",
      "icons": "rgb(226, 226, 226)",
      "ntp_background": "rgba(21, 21, 21, 0.96)",
      "popup_highlight_text": "rgb(234, 234, 234)",
      "popup_highlight": "rgba(206, 76, 76, 0.37)",
      "sidebar_border": "rgb(67, 67, 67)",
      "sidebar_highlight": "rgba(89, 116, 84, 0.6)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(67, 67, 67)",
      "tab_loading": "rgb(123, 123, 189)",
      "toolbar_bottom_separator": "rgb(86, 86, 86)",
      "toolbar_field_border_focus": "rgb(198, 198, 198)",
      "toolbar_field_border": "rgba(33, 33, 33, 0.35)",
      "toolbar_field_focus": "rgba(44, 44, 44, 0.9)",
      "toolbar_field_highlight": "rgba(89, 116, 84, 0.6)",
      "toolbar_top_separator": "rgba(17, 17, 17, 0.85)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{36f40322-ce4c-4950-b9c0-a00afb283a8b}"
    }
  }
}