Examine source code of Thème

{
  "name": "Thème",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Landscape-wallpaper-16.jpg"
    },
    "colors": {
      "frame": "rgb(1, 218, 182)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar": "rgb(27, 255, 0)",
      "bookmark_text": "rgb(248, 112, 140)",
      "toolbar_field": "rgba(131, 128, 249, 0.37)",
      "toolbar_field_text": "rgb(7, 0, 255)"
    }
  }
}