Examine source code of Theme for Christmas

{
  "name": "дядо коледа",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "дядо коледа.jpg"
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.15)",
      "toolbar_field": "rgba(5, 65, 156, 0.38)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "frame": "rgba(1, 7, 18, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)"
    }
  }
}