Examine source code of bird33

{
  "name": "bird1",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "bird3.jpg"
    },
    "colors": {
      "toolbar_field": "rgba(0, 0, 0, 0.26)",
      "toolbar_field_text": "rgba(18, 16, 16, 1)",
      "frame": "rgba(227, 229, 232, 0.96)",
      "tab_background_text": "rgba(0, 0, 0, 0.98)",
      "bookmark_text": "rgba(0, 0, 0, 0.97)"
    }
  }
}