Examine source code of Dark 200

{
  "name": "Dark 200",
  "version": "1.2",
  "manifest_version": 2,
  "theme": {
    "colors": {
      "frame": "rgb(25, 25, 25)",
      "frame_inactive": "rgb(25, 25, 25)",
      "bookmark_text": "rgb(200, 200, 200)",
      "icons_attention": "rgb(200, 200, 200)",
      "tab_text": "rgb(200, 200, 200)",
      "tab_background_text": "rgb(200, 200, 200)",
      "tab_loading": "rgb(240, 240, 240)",
      "tab_line": "rgb(200, 200, 200)",
      "button_background_hover": "rgb(80, 80, 80)",
      "button_background_active": "rgb(100, 100, 100)",
      "popup": "rgb(60, 60, 60)",
      "popup_border": "rgb(80, 80, 80)",
      "popup_text": "rgb(200, 200, 200)",
      "popup_highlight": "rgb(80, 80, 80)",
      "popup_highlight_text": "rgb(230, 230, 230)",
      "toolbar": "rgb(45, 45, 45)",
      "toolbar_field": "rgb(60, 60, 60)",
      "toolbar_field_focus": "rgb(60, 60, 60)",
      "toolbar_field_text": "rgb(200, 200, 200)",
      "toolbar_field_text_focus": "rgb(200, 200, 200)",
      "toolbar_field_highlight": "rgb(80, 80, 80)",
      "toolbar_field_highlight_text": "rgb(230, 230, 230)",
      "toolbar_field_border": "rgb(80, 80, 80)",
      "toolbar_field_border_focus": "rgb(80, 80, 80)",
      "toolbar_top_separator": "rgb(20, 20, 20)",
      "toolbar_vertical_separator": "rgb(80, 80, 80)",
      "toolbar_bottom_separator": "rgb(20, 20, 20)",
      "sidebar": "rgb(60, 60, 60)",
      "sidebar_text": "rgb(200, 200, 200)",
      "sidebar_highlight_text": "rgb(230, 230, 230)",
      "sidebar_border": "rgb(80, 80, 80)"
    }
  }
}