Examine source code of Dark Gray (Highlighted)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Gray (Highlighted)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(38, 38, 38)",
      "toolbar_text": "rgb(154, 154, 154)",
      "frame": "rgb(38, 38, 38)",
      "tab_background_text": "rgb(130, 130, 130)",
      "toolbar_field": "rgb(43, 43, 43)",
      "toolbar_field_text": "rgb(154, 154, 154)",
      "tab_line": "rgb(55, 55, 55)",
      "popup": "rgb(44, 44, 44)",
      "popup_text": "rgb(154, 154, 154)",
      "button_background_active": "rgb(72, 72, 72)",
      "button_background_hover": "rgb(60, 60, 60)",
      "frame_inactive": "rgb(33, 33, 33)",
      "icons_attention": "rgb(80, 195, 65)",
      "icons": "rgb(154, 154, 154)",
      "ntp_background": "rgb(40, 40, 40)",
      "ntp_text": "rgb(154, 154, 154)",
      "popup_border": "rgb(47, 47, 47)",
      "popup_highlight_text": "rgb(154, 154, 154)",
      "popup_highlight": "rgb(66, 66, 66)",
      "sidebar_border": "rgb(47, 47, 47)",
      "sidebar_highlight_text": "rgb(154, 154, 154)",
      "sidebar_highlight": "rgb(66, 66, 66)",
      "sidebar_text": "rgb(154, 154, 154)",
      "sidebar": "rgb(44, 44, 44)",
      "tab_background_separator": "rgba(235, 130, 0, 0)",
      "tab_loading": "rgb(10, 10, 10)",
      "tab_selected": "rgb(43, 43, 43)",
      "tab_text": "rgb(199, 199, 199)",
      "toolbar_bottom_separator": "rgb(45, 45, 45)",
      "toolbar_field_border_focus": "rgb(44, 44, 44)",
      "toolbar_field_border": "rgb(57, 57, 57)",
      "toolbar_field_focus": "rgb(45, 45, 45)",
      "toolbar_field_highlight_text": "rgb(154, 154, 154)",
      "toolbar_field_highlight": "rgb(60, 60, 60)",
      "toolbar_field_separator": "rgba(105, 0, 225, 0)",
      "toolbar_field_text_focus": "rgb(154, 154, 154)",
      "toolbar_top_separator": "rgb(45, 45, 45)",
      "toolbar_vertical_separator": "rgb(50, 50, 50)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee7022c7-6027-4d9e-8c41-89a292c69c97}"
    }
  }
}