Examine source code of Purple v1

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pourple",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(74, 43, 95)",
      "toolbar_text": "rgb(228, 201, 246)",
      "frame": "rgb(59, 36, 85)",
      "tab_background_text": "rgb(217, 157, 255)",
      "toolbar_field": "rgb(19, 8, 29)",
      "toolbar_field_text": "rgb(224, 194, 255)",
      "tab_line": "rgba(222, 145, 255, 0.47)",
      "popup": "rgb(64, 50, 72)",
      "popup_text": "rgb(223, 198, 253)",
      "ntp_background": "rgb(62, 45, 72)",
      "popup_border": "rgb(62, 45, 72)",
      "tab_loading": "rgba(222, 145, 255, 0.47)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{14f9e473-d0cd-4486-b5ef-a6f2cf2c6fce}"
    }
  }
}