Examine source code of Rainbow Spectrum

{
  "name": "Rainbow Spectrum",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "igfsdqig.png"
    },
    "colors": {
      "frame": "rgba(14, 60, 158, 1)",
      "tab_background_text": "rgba(181, 255, 255, 1)",
      "toolbar": "rgba(173, 173, 173, 0.42)",
      "bookmark_text": "rgba(229, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.46)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}