Examine source code of Ubuntu Generic

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ubuntu Generic",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(233, 84, 32)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(44, 0, 30)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(51, 51, 51)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(233, 84, 32, 0)",
      "popup": "rgb(51, 51, 51)",
      "popup_text": "rgb(255, 255, 255)",
      "icons_attention": "rgb(255, 255, 255)",
      "icons": "rgb(0, 0, 0)",
      "ntp_background": "rgb(44, 0, 30)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(51, 51, 51, 0.75)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(233, 84, 32)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(233, 84, 32)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(44, 0, 30)",
      "tab_loading": "rgb(0, 0, 0)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgba(233, 84, 32, 0.75)",
      "toolbar_field_border_focus": "rgb(51, 51, 51)",
      "toolbar_field_border": "rgba(233, 84, 32, 0.25)",
      "toolbar_field_highlight": "rgb(233, 84, 32)"
    }
  }
}