Examine source code of nice red pattern

{
  "name": "nice red pattern",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "red pattern.jpg"
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.19)",
      "toolbar_field_text": "rgba(5, 0, 0, 1)",
      "frame": "rgba(250, 250, 250, 0.98)",
      "tab_background_text": "rgba(255, 240, 240, 1)"
    }
  }
}