Examine source code of NativeDark Theme

{
  "name": "NativeDark Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot 2020-04-27 at 6.47.54 PM.png"
    },
    "colors": {
      "frame": "rgba(20, 20, 20, 1)",
      "tab_background_text": "rgba(66, 63, 63, 1)",
      "toolbar": "rgba(36, 35, 35, 1)",
      "bookmark_text": "rgba(184, 184, 184, 1)",
      "toolbar_field": "rgba(69, 68, 68, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}