Examine source code of Transparent red

{
  "name": "Transparent red",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "transparentRed.png"
    },
    "colors": {
      "frame": "rgba(30, 0, 0, 0.7)",
      "tab_background_text": "rgba(30, 0, 0, 0.7)"
    }
  }
}