Examine source code of Toy Blast

{
  "name": "Toy Blast",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(174, 227, 209, 1)",
      "tab_background_text": "#000000",
      "toolbar": "rgba(219, 198, 184, 0.15)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(1, 63, 99, 1)"
    }
  }
}