Examine source code of One Dark Customised

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "One Dark Customised",
  "theme": {
    "colors": {
      "frame": "#1B1E22",
      "tab_background_text": "#5A5F6A",
      "toolbar": "#282C34",
      "bookmark_text": "#ABB2BF",
      "tab_text": "#ABB2BF",
      "tab_line": "#282C34",
      "toolbar_field": "#393E49",
      "toolbar_field_text": "#9DA5B4",
      "ntp_background": "#282C34",
      "ntp_text": "#ABB2BF",
      "popup": "#282C34",
      "popup_text": "#ABB2BF",
      "popup_highlight": "#1B1E22",
      "popup_highlight_text": "#ABB2BF",
      "sidebar": "#282C34",
      "sidebar_text": "#ABB2BF",
      "sidebar_highlight": "#1B1E22",
      "sidebar_highlight_text": "#ABB2BF"
    }
  }
}