Examine source code of Black / Yellow Style

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Black / Yellow Style",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(20, 20, 20)",
      "toolbar_field": "rgb(40, 40, 40)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 194, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(20, 20, 20)",
      "tab_loading": "rgb(255, 194, 0)",
      "bookmark_text": "rgb(255, 255, 255)",
      "frame": "rgb(20, 20, 20)",
      "tab_background_text": "rgb(150, 150, 150)"
    }
  }
}