Examine source code of Doux hiver

{
  "name": "Doux hiver",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "winter-landscape-2571788_960_720.jpg"
    },
    "colors": {
      "toolbar_field": "rgba(23, 230, 206, 0.05)",
      "toolbar_field_text": "rgba(230, 230, 230, 1)",
      "frame": "rgba(252, 252, 252, 1)",
      "tab_background_text": "rgba(23, 230, 206, 0.2)",
      "bookmark_text": "rgba(23, 230, 206, 0.2)"
    }
  }
}