Examine source code of Yellow Path

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "colorways",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(46, 46, 46)",
      "toolbar_text": "rgb(250, 200, 82)",
      "frame": "rgb(20, 20, 20)",
      "tab_background_text": "rgb(250, 200, 82)",
      "toolbar_field": "rgb(20, 20, 20)",
      "toolbar_field_text": "rgb(250, 200, 82)",
      "tab_line": "rgb(183, 144, 52)",
      "popup": "rgb(20, 20, 20)",
      "popup_text": "rgb(250, 200, 82)",
      "sidebar_border": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(0, 0, 0)",
      "toolbar_field_separator": "rgb(250, 200, 82)",
      "toolbar_top_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(183, 144, 52)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{94cb3163-5d55-47ce-91cb-cc43103d4b0c}"
    }
  }
}