Examine source code of Dazai Osamu Pattern

{
  "name": "Dazai Osamu Pattern",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "ad.png"
    },
    "colors": {
      "toolbar": "rgba(74, 14, 14, 0.31)",
      "toolbar_field": "rgba(87, 40, 40, 0.44)",
      "toolbar_field_text": "rgba(186, 105, 13, 1)",
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(77, 30, 6, 1)",
      "bookmark_text": "rgba(148, 79, 0, 1)"
    }
  }
}