Examine source code of Chrome MacOS Dark

{
  "name": "Chrome MacOS Dark",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screen Shot 2019-06-04 at 8.15.55 PM.png"
    },
    "colors": {
      "frame": "rgba(32, 33, 36, 1)",
      "tab_background_text": "rgba(189, 193, 198, 1)",
      "toolbar": "rgba(50, 54, 57, 1)",
      "bookmark_text": "rgba(218, 222, 223, 1)",
      "toolbar_field": "rgba(40, 44, 47, 1)",
      "toolbar_field_text": "rgba(241, 243, 244, 1)"
    }
  }
}