Examine source code of Van Gog

{
  "name": "Van Gog",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "E5e5r4_s.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(252, 252, 252, 1)",
      "toolbar": "rgba(26, 102, 117, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(26, 102, 117, 1)"
    }
  }
}