Examine source code of Jet Grey

{
  "name": "Jet Grey",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "colors": {
      "frame": "#50535B",
      "tab_background_text": "#BABFC9",
      "tab_background_separator": "#2A323E",
      "tab_selected": "#2C3A46",
      "tab_line": "#2A323E",
      "tab_loading": "#104179",
      "tab_text": "#CAD2E2",
      "icons": "#848D96",
      "icons_attention": "#848D96",
      "toolbar": "#50535B",
      "bookmark_text": "#CAD2E2",
      "toolbar_vertical_separator": "#2C3A46",
      "toolbar_top_separator": "#2A323E",
      "toolbar_bottom_separator": "#2A323E",
      "toolbar_field": "#2C3A46",
      "toolbar_field_text": "#82939A",
      "toolbar_field_separator": "#5C6F77",
      "toolbar_field_border": "#2A323E",
      "toolbar_field_focus": "#2C3A46",
      "toolbar_field_border_focus": "#104179",
      "toolbar_field_text_focus": "#CAD2E2",
      "popup": "#2C3A46",
      "popup_text": "#BABFC9",
      "popup_border": "#2A323E",
      "popup_highlight": "#104179",
      "popup_highlight_text": "#CAD2E2",
      "sidebar": "#2E364A",
      "sidebar_text": "#BABFC9",
      "sidebar_highlight": "#104179",
      "sidebar_highlight_text": "#CAD2E2",
      "sidebar_border": "#2A323E"
    }
  }
}