Examine source code of Monochrome Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Monochrome Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(92, 92, 92, 0.34)",
      "toolbar_text": "rgb(166, 166, 166)",
      "frame": "rgb(42, 42, 42)",
      "tab_background_text": "rgb(203, 203, 203)",
      "toolbar_field": "rgba(78, 78, 78, 0.76)",
      "toolbar_field_text": "rgba(188, 188, 188, 0.81)",
      "tab_line": "rgba(97, 97, 97, 0)",
      "popup": "rgba(46, 46, 46, 0.8)",
      "popup_text": "rgb(143, 143, 143)",
      "button_background_active": "rgb(59, 59, 59)",
      "button_background_hover": "rgb(81, 81, 81)",
      "frame_inactive": "rgb(86, 86, 86)",
      "icons_attention": "rgb(190, 190, 190)",
      "icons": "rgb(166, 166, 166)",
      "ntp_background": "rgb(48, 48, 48)",
      "ntp_text": "rgb(190, 190, 190)",
      "popup_border": "rgba(114, 114, 114, 0)",
      "popup_highlight_text": "rgb(138, 138, 138)",
      "popup_highlight": "rgb(25, 25, 25)",
      "sidebar_border": "rgba(93, 93, 93, 0)",
      "sidebar_highlight_text": "rgb(101, 101, 101)",
      "sidebar_highlight": "rgb(197, 197, 197)",
      "sidebar_text": "rgb(203, 203, 203)",
      "sidebar": "rgb(93, 93, 93)",
      "tab_loading": "rgb(18, 18, 18)",
      "tab_selected": "rgb(71, 71, 71)",
      "tab_text": "rgba(216, 216, 216, 0.82)",
      "toolbar_field_border": "rgba(92, 92, 92, 0)",
      "toolbar_field_focus": "rgba(216, 216, 216, 0.82)",
      "toolbar_field_highlight_text": "rgb(226, 226, 226)",
      "toolbar_field_highlight": "rgb(78, 78, 78)"
    }
  }
}