Examine source code of Dark Tweet

{
  "name": "Dark Tweet",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot_2021-01-17 icarus ( icarusap) Twitter.png"
    },
    "colors": {
      "frame": "rgba(21, 32, 43, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(21, 32, 43, 1)",
      "bookmark_text": "rgba(171, 221, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(176, 176, 176, 1)"
    }
  }
}