Examine source code of Canned Cowboy

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Canned Cowboy",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(26, 14, 5)",
      "toolbar_text": "rgb(204, 13, 13)",
      "frame": "rgb(23, 11, 1)",
      "tab_background_text": "rgb(255, 199, 199)",
      "toolbar_field": "rgb(252, 255, 218)",
      "toolbar_field_text": "rgb(255, 144, 73)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(98, 54, 16)",
      "popup_text": "rgb(255, 220, 195)",
      "button_background_active": "rgb(55, 33, 22)",
      "button_background_hover": "rgb(108, 43, 9)",
      "icons_attention": "rgb(227, 195, 161)",
      "icons": "rgb(255, 220, 195)",
      "popup_border": "rgb(98, 54, 16)",
      "popup_highlight": "rgb(204, 13, 13)",
      "sidebar_border": "rgb(255, 220, 195)",
      "sidebar_highlight_text": "rgb(252, 255, 218)",
      "sidebar_highlight": "rgb(227, 104, 130)",
      "sidebar": "rgb(252, 255, 218)",
      "tab_selected": "rgb(255, 229, 207)",
      "toolbar_field_border_focus": "rgb(173, 71, 18)",
      "toolbar_field_highlight_text": "rgb(204, 13, 13)",
      "toolbar_field_highlight": "rgb(255, 190, 137)",
      "toolbar_top_separator": "rgb(23, 11, 1)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  }
}