Examine source code of True Periwinkle

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Periwinkle",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(233, 233, 255)",
      "toolbar_text": "rgb(95, 95, 255)",
      "frame": "rgb(204, 204, 255)",
      "tab_background_text": "rgb(37, 37, 255)",
      "toolbar_field": "rgb(248, 248, 254)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(225, 225, 254)",
      "popup": "rgb(235, 235, 255)",
      "popup_text": "rgb(69, 69, 255)",
      "tab_loading": "rgb(225, 225, 254)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7ed3ef45-51da-4448-85b5-c59fa6597a0d}"
    }
  }
}