Examine source code of green tab line

{
  "name": "green tab line",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wp1933955-pixel-art-wallpapers.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(161, 20, 20, 1)",
      "bookmark_text": "rgba(194, 21, 21, 1)",
      "toolbar_field": "rgba(163, 70, 70, 1)",
      "toolbar_field_text": "rgba(176, 61, 61, 1)"
    }
  }
}