Examine source code of Au calme

{
  "name": "Au calme",
  "manifest_version": 2,
  "version": "8.0",
  "theme": {
    "images": {
      "theme_frame": "St Martin Lys5.jpg"
    },
    "colors": {
      "frame": "rgba(65, 87, 48, 0.84)",
      "tab_background_text": "rgba(237, 228, 242, 1)",
      "toolbar": "rgba(47, 125, 5, 0)",
      "bookmark_text": "rgba(237, 228, 242, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.25)",
      "toolbar_field_text": "rgba(4, 0, 8, 1)",
      "tab_line": "rgba(3, 33, 3, 0.9)"
    }
  }
}