Examine source code of Blue Spectre 1 Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Spectre 1 Theme",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(47, 62, 109)",
      "toolbar_text": "rgb(234, 227, 228)",
      "frame": "rgb(60, 79, 127)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(21, 23, 64)",
      "toolbar_field_text": "rgb(219, 220, 234)",
      "tab_line": "rgb(44, 61, 94)",
      "popup": "rgb(30, 33, 63)",
      "popup_text": "rgb(220, 220, 233)",
      "tab_loading": "rgb(44, 61, 94)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b634f9a3-b1dc-4e05-85ee-49a7ee770637}"
    }
  }
}