Examine source code of peenstuck

{
  "name": "peenstuck",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "peen.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 51, 51, 1)",
      "toolbar": "rgba(245, 231, 231, 0.61)",
      "bookmark_text": "rgba(217, 130, 130, 1)",
      "toolbar_field": "rgba(209, 232, 255, 1)",
      "toolbar_field_text": "rgba(46, 116, 255, 1)",
      "tab_line": "rgba(247, 202, 202, 1)"
    }
  }
}