Examine source code of Kos&Alb

{
  "name": "Kos&Alb",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 0.65)",
      "toolbar": "rgba(141, 39, 196, 0.5)",
      "bookmark_text": "rgba(212, 55, 55, 1)",
      "toolbar_field": "rgba(250, 10, 10, 1)",
      "toolbar_field_text": "rgba(32, 43, 191, 0.52)"
    }
  }
}