Examine source code of Pixle Cubes (2021)

{
  "name": "Pixle Cubes (2021)",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "6783427-cube-wallpaper.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(235, 235, 235, 1)",
      "toolbar": "rgba(0, 0, 0, 0.35)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(173, 173, 173, 0.6)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}