Examine source code of Icony

{
  "name": "Icony",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "icony-full.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0.99)",
      "tab_background_text": "rgba(148, 148, 148, 1)",
      "toolbar": "rgba(56, 56, 56, 0.79)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(84, 84, 84, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}