Examine source code of XO Dark

{
  "name": "XO Dark",
  "author": "https://t.me/XO490",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "colors": {
      "bookmark_text": "#999999",
      "ntp_text": "#999999",
      "sidebar_text": "#999999",
      "tab_background_text": "#999999",
      "toolbar_field_border_focus": "#999999",
      "toolbar_field_text": "#999999",
      "toolbar_text": "#999999",
      "button_background_active": "#181818",
      "frame": "#181818",
      "frame_inactive": "#181818",
      "ntp_background": "#181818",
      "popup": "#181818",
      "popup_border": "#181818",
      "sidebar": "#181818",
      "sidebar_border": "#181818",
      "toolbar": "#181818",
      "toolbar_bottom_separator": "#181818",
      "toolbar_field_focus": "#181818",
      "toolbar_field_separator": "#181818",
      "toolbar_top_separator": "#181818",
      "button_background_hover": "#131313",
      "popup_highlight_text": "#131313",
      "sidebar_highlight_text": "#131313",
      "toolbar_field": "#131313",
      "toolbar_field_highlight_text": "#131313",
      "icons": "#444444",
      "tab_background_separator": "#444444",
      "toolbar_field_border": "#444444",
      "icons_attention": "#ab00ff",
      "popup_highlight": "#cccccc",
      "popup_text": "#cccccc",
      "sidebar_highlight": "#cccccc",
      "toolbar_field_highlight": "#cccccc",
      "toolbar_field_text_focus": "#f9f9f9",
      "tab_line": "#cccccc",
      "tab_selected": "#2E2E2E",
      "tab_loading": "#f9f9f9",
      "tab_text": "#f9f9f9"
    }
  }
}