Examine source code of Polar

{
  "name": "Polar",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "1.png"
    },
    "colors": {
      "frame": "rgba(230, 195, 235, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(241, 203, 242, 1)",
      "bookmark_text": "rgba(115, 39, 110, 1)",
      "toolbar_field": "rgba(248, 230, 250, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(223, 200, 235, 1)"
    }
  }
}